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                               (Amendment No. )


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                         Rational Software Corporation
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          _____________________________________________________________________

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          _____________________________________________________________________

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          pursuant to Exchange Act Rule 0-11 (set forth the amount on which
          the filing fee is calculated and state how it was determined):

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                                                                             2


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                           Filed by International Business Machines Corporation
                                                        Pursuant to Rule 14a-12
                                         of the Securities Exchange Act of 1934

                                Subject Company:  Rational Software Corporation
                                                Commission File No.:  000-12167



Q&A ADDENDUM 2

Payroll and Direct Deposit

What is IBM's US payroll schedule (weekly, semi-monthly, monthly)?

     IBM HAS A BI-MONTHLY PAY SCHEDULE, WITH SCHEDULED PAY DATES ON THE 15TH AND
     THE LAST WORKDAY OF EACH MONTH.


Will we have one or more "live" checks when we first switch over to IBM's
payroll, or will direct deposit start right away?

     IF YOU CURRENTLY USE DIRECT DEPOSIT, THIS WILL CONTINUE ONCE YOU HAVE
     TRANSITIONED TO IBM. THE ELECTRONIC DEPOSIT WILL POST TO ONLY ONE PRIMARY
     ACCOUNT. IF YOU USE DIRECT DEPOSIT YOU WILL RECEIVE AN ELECTRONIC STATEMENT
     VIA LOTUS NOTES. YOU WILL NOT RECEIVE A PAPER COPY OF YOUR PAY STATEMENT.


Does IBM offer a choice of hardcopy or electronic paystubs?

     HARDCOPY PAYCHECKS AND PAY STATEMENTS WILL BE AVAILABLE ONLY FOR EMPLOYEES
     WHO DO NOT USE ELECTRONIC FUND TRANSFER (EFT) OR DIRECT DEPOSIT. IBM
     ENCOURAGES ALL OF ITS EMPLOYEES TO USE THE ELECTRONIC FUND TRANSFER OR
     DIRECT DEPOSIT FOR THEIR PAYCHECKS, WHICH GENERATES AN ELECTRONIC STATEMENT
     THAT YOU CAN FILE OR PRINT. IBM PAYROLL'S GOAL IS TO HAVE HARDCOPY
     PAYCHECKS AND PAY STATEMENTS AT AN EMPLOYEE'S CHECK DISTRIBUTION OFFICE IN
     TIME FOR THE DESIGNATED PAYDAY.

Does IBM have direct deposit available for expense reports? How will Rational
employees sign up?

     YES, IBM HAS DIRECT DEPOSIT AVAILABLE FOR EXPENSE REPORTS. UPON ACQUISITION
     CLOSE, EMPLOYEES WILL HAVE THE OPPORTUNITY TO SIGN UP FOR THIS SERVICE. FOR
     THOSE EMPLOYEES WHO TRAVEL SEVERAL TIMES A YEAR, YOU WILL BE ISSUED A
     CORPORATE CHARGE CARD TO BE USED FOR ALL BUSINESS TRAVEL AND MISCELLANEOUS
     EXPENSES. IBM USES AN EXPENSE REIMBURSEMENT APPLICATION CALLED EA 2000 FOR
     SUBMITTING BUSINESS EXPENSES, WHICH INCLUDES TRAVEL AND MISCELLANEOUS
     EXPENSES. THE CHARGE CARD COMPANY IS REIMBURSED THROUGH THE DIRECT PAY
     FEATURE OF EA 2000 AND ANY OUT OF POCKET EXPENSES WILL BE REIMBURSED
     DIRECTLY TO YOU.






General Benefits

If I have a lot of medical deductions that have been taken out towards my annual
deductible before the close, will they roll over to IBM or will I have to start
over?

     YOU WILL BE GIVEN CREDIT FOR THOSE DEDUCTIBLES TAKEN UNDER THE RATIONAL
     MEDICAL AND DENTAL PLANS. TO RECEIVE CREDIT FOR DEDUCTIBLES, EMPLOYEES MUST
     INCLUDE AN EXPLANATION OF BENEFITS FORM FROM THEIR RATIONAL PROVIDER WITH
     THEIR FIRST CLAIM SUBMISSION TO IBM. PLEASE ENSURE THAT THE DEDUCTIBLE
     AMOUNTS ARE CLEARLY INDICATED ON THE EXPLANATION OF BENEFIT FORM.
     SUBSEQUENT CLAIMS SHOULD BE MAILED TO THE ADDRESS ON THE CLAIM FORM. NOTE:
     HMO/DMA CO-PAYS ARE NOT ELIGIBLE FOR SUBMISSION TOWARDS THE IBM DEDUCTIBLE.


How can I find out if the doctors my family currently uses accept the medical
insurance plan IBM offers in my area?

     IBM BENEFITS ENROLLMENT INFORMATION WILL BE MAILED TO RATIONAL EMPLOYEE'S
     HOMES DURING THE WEEK OF JANUARY 6, 2003. INCLUDED IN THIS MAILING ARE
     CONTACT NUMBERS TO CALL TO DETERMINE PROVIDER COVERAGE.


Does IBM have domestic partner benefits? Assuming the answer is yes, do I need
to register my domestic partner even if s/he is not using my health benefits?

     IBM DEFINES A DOMESTIC PARTNERSHIP AS THE RELATIONSHIP
     BETWEEN TWO PEOPLE WHO MEET ALL OF THE FOLLOWING CRITERIA:

     o    THEY ARE OF THE SAME GENDER

     o    THEY SHARE AN INTIMATE, COMMITTED RELATIONSHIP WITH EACH OTHER; INTEND
          TO DO SO INDEFINITELY; AND HAVE NO SUCH RELATIONSHIP WITH ANY OTHER
          PERSON

     o    THEY ARE JOINTLY RESPONSIBLE FOR EACH OTHER'S WELFARE AND FINANCIAL
          OBLIGATIONS

     o    THEY RESIDE IN THE SAME HOUSEHOLD

     o    THEY ARE NOT RELATED BY BLOOD TO A DEGREE OF KINSHIP THAT WOULD
          PREVENT MARRIAGE FROM BEING RECOGNIZED UNDER THE LAW OF THEIR STATE OF
          RESIDENCE

     o    EACH OF THEM IS OVER AGE 18, OF LEGAL AGE, AND MENTALLY COMPETENT TO
          ENTER A CONTRACT

     o    THEY RESIDE IN A STATE UNDER THE LAW OF WHICH MARRIAGE OR AN ATTEMPTED
          MARRIAGE BETWEEN TWO PERSONS OF THE SAME GENDER IS NOT RECOGNIZED AS A
          VALID MARRIAGE

     o    NEITHER OF THEM IS MARRIED TO A THIRD PARTY

     IT IS NECESSARY TO COMPLETE A CONFIDENTIAL AFFIDAVIT TO ESTABLISH A RECORD
     OF THE RELATIONSHIP FOR MEDICAL AND OTHER BENEFITS, E.G., GROUP LIFE
     INSURANCE, ETC.







Who is the record keeper for IBM's 401(k) plan? How can I get more information
about the investment options?

     HEWITT ASSOCIATES IS THE ADMINISTRATOR OF THE IBM SAVINGS PLAN. THEY WILL
     PROVIDE DETAILED INFORMATION ABOUT THE 21 DIFFERENT INVESTMENT OPTIONS
     OFFERED SHORTLY AFTER THE CLOSE DATE.


Can you tell me more about IBM's tuition reimbursement program? What are the
annual dollar limits and the approval process?

     UNDER THE IBM ACADEMIC LEARNING ASSISTANCE PROGRAM THERE IS A PROVISION FOR
     PROVIDING REIMBURSEMENT FOR INDIVIDUAL COURSES. ALL REQUESTS FOR TUITION
     REIMBURSEMENT MUST HAVE MANAGEMENT APPROVAL PRIOR TO ENROLLMENT. UPON
     DEMONSTRATION OF SATISFACTORY COMPLETION OF THE COURSE(S), UP TO 100% OF
     THE TUITION/FEES WILL BE REIMBURSED.


Time Off

What is IBM's policy on time off for jury duty?

     TIME OFF WITH PAY IS PROVIDED FOR JURY DUTY AND IT IS NOT NECESSARY TO
     REIMBURSE IBM FOR ANY JUROR PAY RECEIVED.


Is it true that IBM offers additional time off to employees who are getting
married? How about to employees over age 50?

     THERE IS NO SPECIFIC TIME OFF POLICY FOR MARRIAGE OR FOR EMPLOYEES OVER 50
     YEARS OF AGE. IBM MANAGERS, HOWEVER, ARE EMPOWERED TO GRANT ADDITIONAL TIME
     OFF DEPENDING ON INDIVIDUAL CIRCUMSTANCES.


Career Development

When will IBM employee training programs be available to Rational employees?

     UPON ACQUISITION CLOSE DATE, EMPLOYEES WILL BE IMMEDIATELY ELIGIBLE TO
     PARTICIPATE IN IBM TRAINING PROGRAMS WITH PRIOR APPROVAL FROM THEIR
     MANAGER.


When can Rational employees start looking for career opportunities inside IBM?

     IBM OFFERS A JOB POSTING SYSTEM WHERE EMPLOYEES CAN ACCESS OPEN POSITIONS
     WITHIN THE U.S. FOLLOWING THE ACQUISITION CLOSE DATE, RATIONAL EMPLOYEES
     WILL BE ISSUED A VM USER ID AND PASSWORD TO ACCESS THE JOB POST SYSTEM.






Performance Management

Does IBM have a ranking process for performance evaluation?

     NO, THE IBM PERFORMANCE MANAGEMENT SYSTEM CALLED PERSONAL BUSINESS
     COMMITMENTS (PBC) DOES NOT INCLUDE A RANKING COMPONENT. FURTHER INFORMATION
     ABOUT THE IBM SYSTEM WILL BE PROVIDED DURING THE EMPLOYEE ORIENTATION
     MEETINGS.


What is the calendar for employee performance reviews within IBM? Are there
specific performance measurements they use and what are they?

     PERFORMANCE REVIEWS ARE GENERALLY PERFORMED DURING THE MONTHS OF DECEMBER
     AND JANUARY FOR THE PRIOR CALENDAR YEAR. IBM EMPLOYEES SET PERSONAL
     BUSINESS COMMITMENTS (PBC) THAT ALIGN DIRECTLY WITH IBM'S BUSINESS
     OBJECTIVES. PBC ACHIEVEMENTS -- INCLUDING BUSINESS RESULTS, DEMONSTRATED
     BEHAVIORS, AND OVERALL PERFORMANCE -- DETERMINE YOUR ANNUAL PBC RATING.


Will Rational employees be eligible for the IBM performance and salary review
program in 2003? Will our participation be prorated?

     DEPENDING UPON THE ACQUISITION CLOSE DATE, THERE COULD BE LIMITED
     PARTICIPATION IN THE 2003 PROGRAM.


General Employment And Other Questions

Will our positions be the same job/grade level at IBM that they are at Rational?

     YOU WILL BE JOINING IBM IN COMPARABLE POSITIONS AND PAY BANDS TO THOSE YOU
     HAD AT RATIONAL.

One of the documents we need to sign mentions IBM has the right to obtain an
Investigative Consumer Report. What is this? Is this document being required by
ALL employees, or is this only required of those employees involved in financial
areas?

     THE CONSUMER REPORT NOTIFICATION INFORMS AN APPLICANT THAT A CONSUMER
     REPORT MAY BE OBTAINED FOR EMPLOYMENT PURPOSES AS PART OF THE
     PRE-EMPLOYMENT BACKGROUND INVESTIGATION. THE CONSUMER REPORT NOTIFICATION
     IS A SEPARATE FORM AND CANNOT BE ATTACHED TO THE APPLICATION FOR EMPLOYMENT
     OR ANY OTHER DOCUMENT. ALL EMPLOYEES ARE REQUIRED TO SIGN THIS DOCUMENT AS
     IT IS A PART OF OUR NORMAL EMPLOYMENT PROCESS.






Does IBM offer their sales teams a program similar to our "Founders' Club"
(Trip/award based on annual quota attainment)?

     THE PROVISIONS OF THE SALES PLANS AND OTHER INCENTIVE PROGRAMS HAVE NOT YET
     BEEN DETERMINED. THEY WILL BE COMMUNICATED AS SOON POSSIBLE AFTER THE
     ACQUISITION CLOSE DATE.

Does IBM have a charitable contribution matching program? If so, how does it
work?

     IBM HAS A MATCHING GRANTS PROGRAM, WHICH HAS DEFINED REQUIREMENTS THAT MUST
     BE MET FOR INSTITUTIONS TO BE ELIGIBLE. IT INCLUDES BOTH CASH CONTRIBUTIONS
     MATCHED ON A 1: 1 BASIS FOR ACTIVE EMPLOYEES AND AN EQUIPMENT/SOFTWARE
     OPTION TO APPROVED U.S. BASED COLLEGES, UNIVERSITIES, AND OTHER
     POSTSECONDARY INSTITUTIONS, HOSPITALS AND CULTURAL INSTITUTIONS. IN
     ADDITION, THE IBM EMPLOYEE CHARITABLE CONTRIBUTION CAMPAIGN (ECCC) IS A
     YEARLY NATIONAL SOLICITATION PROGRAM DESIGNED TO PROVIDE EMPLOYEES AND
     RETIREES WITH THE OPPORTUNITY TO CONTRIBUTE TO NEARLY 2,500
     EMPLOYEE-NOMINATED NOT-FOR-PROFIT IRS 501(C)(3) HEALTH AND HUMAN SERVICES
     AGENCIES ACROSS THE UNITED STATES AND ENCOURAGES THEM TO VOLUNTEER IN THE
     COMMUNITY. THE ECCC TAKES PLACE IN OCTOBER OF EACH YEAR AT ALL IBM US
     LOCATIONS. IN ADDITION, THE ECCC CONDUCTS A DIRECT MAIL SOLICITATION TO
     RETIREES AND A SEPARATE CAMPAIGN IS RUN FOR EXECUTIVES IN SEPTEMBER.

Which airline, if any, is IBM's preferred airline for business travel?

     BUSINESS TRAVELERS ARE EXPECTED TO UTILIZE AMERICAN EXPRESS TRAVEL TO BOOK
     THEIR TRAVEL ARRANGEMENTS. THEY WILL BOOK THE MOST ECONOMICAL TRAVEL
     CONSISTENT WITH THE EMPLOYEE'S SCHEDULE.







Text of conference call with IBM, Rational and financial analysts discussing,
among other things, the merger.

Text:

Miceala:          Webcast Operator/Moderator

Herb A. Parks:    Webcast Host, IBM VP Investor Relations

Steve Mills:      IBM Senior VP and Group Executive for Software

Mike Devlin:      Rational CEO

Miceala:       Good morning, ladies and gentlemen, and welcome to the IBM
               teleconference. At this time all participants have been placed on
               a listen-only mode, and the floor will be open for questions
               following the presentation. It is now my pleasure to turn the
               floor over to your host, Mr. Herb A. Parks. Mr. Parks, the floor
               is yours.


Parks:         Thank you, Miceala, and good morning. This is Herbie Parks, Vice
               President of Investor Relations for IBM, and thank you all for
               joining us again this week. Let me point out again that certain
               comments made during this called may be categorized
               forward-looking under the Private Securities Litigation Reform
               Act of 1995 and that those statements involve a number of factors
               that could cause actual results to differ materially and, as you
               know, additional information concerning these factors is
               contained in the company's filing with the SEC and copies are
               available from the SEC from the IBM website or from us in
               Investor Relations. So, at this





                                                                               2


               time, without any further ado, let me turn the call over to Steve
               Mills, IBM Senior Vice President and Group Executive for
               Software. Steve.


Mills:         Good morning. As I think all of you now know, IBM today has
               announced that we've reached a definitive agreement to acquire
               Rational Corporation. Rational is one of the industry's leading
               providers of software development tools focused on providing a
               complete end-to-end capability for application development.
               Rational is seen by medium and small business as a premier
               provider of tools that allow businesses to effectively capture
               requirements and analyze those requirements to create designs for
               applications to then feed into tools that help businesses build
               those applications, to test the applications and manage the
               development process. They are uniquely positioned to support the
               kinds of applications that not only businesses are in the midst
               of building and deploying today, but, in particular, those that
               we see businesses will need to deploy in the future, those that
               involve the connection of business activities and processes with
               an on-demand environment that we spoke of on the 30th of October
               when we described a world in which business is connected--not
               just merely to their customers, but also through their internal
               processes, out to their suppliers and creating environments that
               are dynamic, changeable and adaptable to changing external
               conditions. To achieve that goal, you need a powerful set of
               design-and-build tools that make it





                                                                               3

               possible to create these applications and manage them across
               their life cycle. Rational is recognized across the industry by
               literally tens of thousands of companies as the premier provider
               of development tools that make it possible to build those kinds
               of applications. They have the extraordinary installed base
               across a wide range of counts in industries from the industrial
               sector, process industry, from finance to government types of
               projects. They've been in business for the last twenty years in
               delivering these kinds of technologies and, in fact, had been an
               IBM business partner and one of our most important business
               partners dating back to 1988. We've had a strong, long-term
               working relationship with Rational. We have recommended and sold
               each other's products over the years as we've built our
               relationship, and both our companies have found this to be the
               right time to come together to realize a more powerful and more
               synergistic set of offerings in the marketplace as we see the
               world moving to this on-demand environment, and there's a need
               for a better collection of tooling and infrastructure necessary
               to support these kinds of environments. This is a deal that both
               companies are very excited about. I'm going to let Mike Devlin
               say a few words here in a minute. He joins us here on the phone.
               He's the CEO of Rational. Rational will be becoming part of IBM's
               Software Group organization and is being positioned as our next
               major strategic brand. We've been featuring Websphere, DB2, Lotus
               and Tivoli in the marketplace in recent years and




                                                                               4


               we're going to add a fifth critical brand in the Rational brand,
               which will be the brand that we're going to use long term for our
               tooling capability for all the build functions that are important
               to the environment that we're trying to enable. Rational has some
               3500 employees doing business in over 80 countries around the
               world. They have an incredibly strong field organization--very
               technically capable and a tremendous culture focused on customer
               support and customer success. And, so, we see this as a very
               logical and a great matching up of two companies that share a
               common vision of where information technology needs to go to
               support businesses in the future. Before I turn over to Mike for
               some brief comments on synergies and fit here, I want to make a
               few comments for all of you that will undoubtedly ask me
               questions relative to the financial characteristics of this deal.
               Just let me say a few words to preempt what's likely to be some
               of the questions you'd ask. As I think you may have seen, this is
               a $10.50 per share acquisition which has a gross value of $2.1
               billion that IBM will spend to acquire Rational. It is a cash
               deal. You'll obviously ask questions about what impact does this
               have on the IBM Company, and I'd remind you, as I think you know,
               that we have to go through the usual purchase accounting
               activities looking to in-process R&D and things of this nature to
               finally come up with a firm position on the way in which this
               transaction will affect our business in 2003 and beyond.
               Obviously, from a business-case perspective, we see this is a
               very attractive acquisition. It




                                                                               5

               generates cash right off the bat. Obviously, we'll have to deal
               with one-time charge issues, which may have a very modest effect
               next year and, of course, as John Joyce speaks to you in the
               first part of next year, as we work through the next phase of the
               acquisition process, we'll get more of a bead on what those
               numbers will look like and update you again. So this is just
               strictly some very, very rough guidance, if you will, and we
               expect very nominal impact. So I would tell you that it's very
               premature for you to make any changes to your models. As a
               software company, I think you know that these are very attractive
               businesses. They throw off lots of cash. Rational has a gross
               profit margin consistent with the IBM Company software business
               of about 85%, and we see lots of synergies here as we bring the
               two businesses together. And it is a very attractive deal from
               the IBM-shareholder perspective. Some of you may ask questions
               relative to uses of cash, given that we've made our recent
               announcement on how we're going to make additional contributions
               to a pension fund. This acquisition, the use of cash here was
               something that we have looked at and considered in the context of
               all the things that we need to do. In fact, as you heard from
               John Joyce on Wednesday that we had planned to continue to make
               investments in R&D, capital expenditures as well as acquisitions,
               this fits into that overall envelope of our use of cash and stock
               to deal with the various things that we need to do to both fund
               our company's future as well as deal with the pension fund.




                                                                               6


               And, of course, this incremental use of cash was part of the
               discussions we had had with the rating agency. So from that
               perspective, this is very much business as usual. With that
               having been said, let me turn over to Mike Devlin to add some
               additional thoughts here on this acquisition and how he sees this
               as providing tremendous leverage for our customers here as we
               look ahead to the kinds of applications businesses want to build
               and deploy for the future.


Devlin:        Thanks, Steve, and I just want to echo the same level of
               excitement about this transaction. We're very excited about this
               from the point of view of our shareholders, our customers and our
               team. We feel that there's a tremendous strategic opportunity,
               that customers are demanding the kinds of architectures and
               applications that Steve alluded to that requires the industry to
               offer a more complete solution that can address the development
               and deployment of these applications on a high-performance,
               reliable platform, and we believe this combination will be unique
               in the industry and that it will be the only combination that has
               that complete solution for customers. Rational has been driving
               the software engineering industry and profession over the last
               twenty years. We believe we've been successful not only in
               defining market-leading products but basically changing what it
               means to develop software over the last twenty years, and we
               think this is actually an opportunity for us to




                                                                               7


               accelerate that by integrating with the IBM platform, taking
               advantage of the access to a much broader base of customers and,
               of course, as Steven said, we've known the folks at IBM for many,
               many years. IBM has been one of our largest customers going all
               the way back to 1985, and I'm really excited about this. Thanks,
               Steve.


Mills:         Okay, Mike, thanks. Let's operator, uh, now open up for
               questions.


Micaela:       Thank you, Gentlemen. The floor is now open for questions. If you
               do have a question or a comment, please touch the numbers one
               followed by four on your Touch-tone(TM)telephone at this time. If
               at any point your question has been answered, you may remove
               yourself from the queue by pressing the pound key. Questions will
               be taken in the order received. We do ask all participants to
               please utilize their handset for optimum sound quality. Please
               hold as we pause for questions. Our first question is coming from
               John McTague of Prudential Securities. Please go ahead. Mr.
               McTague, your line is live.


Parks:         You can come back to him, Micaela.


Micaela:       Our next question is going to be coming from John Jones of
               Soundview Technologies. Please go ahead.





                                                                               8

Jones:         Nice job. Couple of questions: Can you talk about where the
               overlap is with your current product line and how much overlap?
               When will this transaction close and, Mike, can you just
               reference how large your sales force is--and it's fortuitous
               that, I guess, IBM is building up their sales force and you've
               got one?


Mills:         Let me start off here, John. Obviously we would have to go
               through all the normal filings. We would expect the normal
               process would have us close sometime in the first quarter, but we
               have to go through that exercise as always. From a standpoint of
               overlap and synergy, actually Rational is a great match for what
               we do. Our investments in development tools have been focused on
               compiler language-based technologies. That's what our, you know,
               various brands and offerings out there are all about--is
               delivering environment specific to languages, Java, C, C+
               obviously--you know, Cobol and things of that nature and things
               for mainframe development. And Rational's focus is on analysis,
               design, test and deployment. So that critical middle box related
               to compilers is something that has always permitted us to have a
               great partnership with Rational because where we had focused our
               attention on compilers was exactly complementary to all the other
               things Rational was focused on at either end of the development
               life cycle. So, in fact, there is no overlap here in the product
               line. There is tremendous synergy between the two. We're




                                                                               9


               not going to be--have to be--dealing with difficult product
               positioning. And the beauty of this is that we've had this
               long-standing relationship in the market and been selling
               Rational technology for many years, so our teams are capable of
               positioning Rational today because of our joint relationship in
               the marketplace. Mike?


Devlin:        Thanks, Steve. The field organization, there's--counting the
               technical resources and the sales executives--there's about 1500
               people in the field organization and that's a very focused field
               organization, focused on helping customers to be successful
               developing, deploying applications and I think that team is going
               to fit in very well into this environment both because of common
               focus on customer success and, as Steve says, the product line
               . . . it's not an accident that there's no overlap there. We've
               been working together since 1988, as Steve said, in terms of our
               product strategy.


               IBM has about 10,000 dedicated software sales people in the
               marketplace today. And so the, we have, already have the
               industry's largest direct sales force selling software and the
               Rational team fits into that very nicely in terms of the culture,
               the way in which they're deployed today, the heavy focus on
               customer support and implementation. All that fits quite nicely
               into the model that we have established in the marketplace.




                                                                              10


?:             Uh, Mike, can I just follow up on your focus has, historically, I
               guess, been on Microsoft and web share development platform? Do
               you do any development in the Linux sphere? Do your products work
               in the Linux sphere?


Devlin:        Yes, our products, in fact, are what customers have demanded.
               There's support for a variety of platforms ranging from PCs,
               Unix, Linux, mainframes, support, and our products do support
               Linux both in the sense of running on Linux and also developing
               applications that are targeted at deployment on Linux.


Parks:         Thank you. Our next question, please.


Miceala:       Thank you. Our next question is coming from Steven Weber of SG
               Callen. Go ahead, sir.

Weber:         Good morning. Do you think that you can this combo over a
               multi-year period the growth rate should be accelerated or is
               there so much previous combo here that that's really not an
               opportunity?


Mills:         No, we definitely think that we can realize growth synergies with
               this acquisition and we see it from the following perspective. If
               you look at it in terms of the profile of a Rational customer
               base today, Rational has





                                                                              11


               tremendous strength in the industrial sector, in Department of
               Defense and government projects, in the telecommunications
               sector. And the penetration of their tools, and the use of their
               tools is quite significant in that arena. It's an area that we
               want to increase the penetration of the IBM products. Coming at
               it the other way, finance and insurance. Any of the IBM products
               do extremely well in finance and insurance. The chance to pull
               more Rational tooling in . . . into that market, retail, health
               care, those kinds of areas. So we have synergy from an industry
               perspective. Although Rational does business in some 80 countries
               around the world, the IBM geographic reach is further and deeper
               than Rational's been able to attain, so we see natural synergies
               in terms of market reach. The second thing, obviously, is that as
               customers move to this more horizontally integrated approach to
               their information technology environments, the ability to build,
               run and manage around one common platform, one common
               environment, where the tools to build complement the environment
               itself that you run on top of and the management can be built in
               if you will right up front, that capability, that requirement is
               something that we think together we're going to be uniquely in a
               position to fulfill. We have tremendously powerful runtime
               environments in IBM in our web sphere product, DB2, Lotus
               collaboration capability. We have very strong management tools
               around the Tivoli portfolio, and this adds significant





                                                                              12

               strength and significantly improves our capability on the build
               side to create a complete end-to-end platform.


Parks:         Next, the next question please.


Miceala:       Thank you. Our next question is coming from Laura Conigliaro of
               Goldman Sachs. Please go ahead.


Conigliaro:    Yes, a couple of things. When you--ah, that is IBM--when you
               announce the PWC acquisition at the same time you discussed
               whether or not and when you expected it to be accretive and, in
               this case, you did not, and I guess that leaves the question of
               To what extent did this deal get hurried up for some other
               reason?--that is, why did you actually do this now? At the same
               time, given the financial characteristics of the deal that you
               described Steve as well as the potential for
               synergy--particularly since you've been working together--is
               there an intention at least for this to be nondilutive in 2003?


Mills:         First of all, we tried this long-standing relationship with
               Rational and have discussed over the years what . . . in which
               . . . ways in which to improve our partnership. So, this is not
               some sudden event, nor is it in any way any kind of a rushed
               event.





                                                                              13


Conigliaro:    Was there somebody else, though who--given the kinds of things
               you're talking about--who may have come in and also been
               interested in this these same kinds of characteristics that
               you've discussed, and therefore it created a little more urgency
               around the timing?


Mills:         Nope. Absolutely not. There's no story there. There's no . . .
               this is IBM and Rational. Our relationship, as I say, goes back a
               very long way . . . and this is something that's just an
               outgrowth of the ongoing conversations we've had about how to
               achieve the shared vision that we've had. And, Irv, you might
               want to comment on the PW versus this transaction. We clearly,
               software companies and the way in which one accounts for
               in-process R&D and goodwill and things of that nature and the
               opinions and determinations on the treatment of those things has
               an effect upon the way in which the software deal appears in the
               first year versus subsequent years.


Irv:           Right, Steve. Laura, as Steve indicated, we can bring a third
               party in to assess the assets in this purchase accounting, as you
               know, so these processes are indeed immediately written off. You
               would have some intangible assets which, would have to be set
               aside, identified. Those are advertised over several years and
               then, of course, what's identified as goodwill is put on the
               balance sheet. So we have to have a third party





                                                                              14


               come in and do that. We've done some of our own analysis, our own
               estimates, and they would lead us to think that in 2003 EPS might
               be impacted by a few pennies on both the one-time and the
               recurring charges. By 2004 it should be neutral and then positive
               thereafter but . . . so we obviously think this acquisition's
               attractive both competitively and financially, but two things:
               first, is that that gap accounting from a cash standpoint as
               Steve said, this starts generating cash virtually from day one
               because of the attractive characteristics of a software business.
               And let me just reiterate just that we have to finalize the deal
               we've got to go through this analysis, so my view is that let's
               not change your models at this juncture if you can assess this
               for its value which Steve has talked about but if that's we've
               just got to go through that work and that's life with PWC and
               that's a services business, this is a software business and they
               have differences and we got to get that work done.


Steve:         And this is like the Informix deal a couple years ago. They had
               the same comments at that point in time that there are things
               that we can't provide a definitive position on yet.


Irv:           So once you get closed, and we'll get back to you, and we're
               thinking this is going to be first quarter, so I would say
               probably around the time that





                                                                              15


               we report our first-quarter earnings.  If it's sooner, we'll
               do it then.  Next question, please.


Miceala:       Thank you. Our next question is coming from Lynnette Donovan of
               Deutsche Asset Management. Please go ahead.


Donovan:       Well, I think most of my question has been answered, but I just
               wanted to try to clarify again if your, if your sales of Rational
               software how much of it really went through the IBM Trent
               channel, how much goes through the IBM channel today?


Mills:         Our relationship with Rational today is a co-sell, you know, type
               of relationship in the marketplace. We collaborate together as
               partners in the marketplace, and they deliver their technology
               and we deliver ours. Certainly, parts of IBM global services have
               used the Rational tools over the years and so, in that sense, we
               are a customer. Some of our laboratory teams have also used some
               of the Rational tools for different aspects of development. So we
               are a customer, though clearly a relatively modest-sized
               customer, of Rational and as a partner we go to market not in the
               mode of necessarily literally selling their products but rather
               co-selling their products since, you know, use, knowledge and
               skill are critical issues, and the Rational team brings the
               training and education and support to bear to complete the sale.





                                                                              16


Donovan:       Does Rational have and seek resellers now and who are their
               business resellers?


Mills:         Mike, you want to comment on that?


Devlin:        Yeah, the vast majority of Rational sales are direct through our
               own direct field organization which is responsible for both the
               presales activities and then supporting those customers to make
               sure they're successful.


Parks:         Thanks, Lynnette. Next question please.


Miceala:       Thank you, our next question is coming from Andy Neff of Bear
               Stearns. Please go ahead.


Nest:          Sure. Just three things if I could. One, could you just give a
               sense about what impact this would have on other relationships
               where there might be a conflict such as Oracle, Sequel server and
               BEA? Second, could you give some sense of dilution at least on a
               price to sales basis it seems relatively high we are looking at
               about three times sales relative to other recent software
               acquisitions. Give us a sense about the valuation approach that
               you took. And third, I just want to make sure that we're clear on
               what you're saying in terms of dilution, you're saying it'll be a
               few pennies




                                                                              17


               from, for `03 from charge offs and from the ongoing business so
               it's a few pennies for each? I just want to clarify that.


:              I'll do the last one. Andy, look I was trying to be, just put it
               in the ball park, because we got a lot of work to do, so I was
               trying to adjust there could be a few pennies, that could be one
               time associated with a process R&D and there could be a few
               pennies that are associated with the kind of the ongoing or the
               operational results but that's being impacted by the amortization
               of intangibles, but again, that's just meant to be rough to give
               you a size where it is and it certainly is not basis for you to
               change your model and then by 2004 ongoing break-even obviously
               accelerating in there by 2005 very positive accretion and I'll
               turn back to Steve.


Mills:         On your middle question, I'm not going to get into a long
               discussion of valuation techniques. I mean software companies
               have always had a range of valuations around them based upon
               market positions, strategic positioning fit, things of that
               nature. Rational's a very strong software company with a very
               important position in the marketplace. We think the price that
               we've reached is fair for both parties, both the Rational
               shareholders as well as fair on the IBM side. As far as the world
               of heterogeneous systems this is business as usual. Rational has
               a huge business on Sun and HP as well as on Windows. Rational
               tools are used




                                                                              18


               to build applications that support things such as BEA's web logic
               environment, Oracle database. The IBM product line, software
               product line has a huge install base on Sun, HP, Windows. We
               deliver lots of products that use Oracle as a database. Our tools
               are the most popular Java-based development tools today to build
               BEA web logic based applications. It is a mix and match world.
               There is no intent to do anything other than mix and match and be
               modular and networks and technology to fit into all the various
               kinds of products that customers run today. So I don't see this
               having any effect on that world of heterogeneous mix and match
               software.


:              Steve, just to go to your second, the second point, I know you
               don't want to talk about valuation but in using cash one of the
               concerns it would create is that what have you done to keep the
               Rational employees at IBM, if it's an all cash deal.


Steve:         Rational employees, we're expecting them to come across and come
               work for IBM. These are the kinds of deals that we've always
               done. We have done 24 acquisitions of software businesses since
               1995. They have all been cash deals and we establish their salary
               plans and compensation and incentives and everything else
               consistent with the way in which software businesses run.




                                                                              19


:              Ok great.


Mills:         And Informix is a good example of that. We've had, we set up a
               complete plan for bringing the people across and everything
               worked fine.


Parks:         Thanks Andy. Next question please.


Miceala:       Thank you. Our next question is coming from Tim Clacell of Thomas
               Weisel Partners.


Clacell:       Yeah, good morning everybody. Can we hit a little about the
               Microsoft relationship with Dot Net? You mentioned mix and match
               but Microsoft is a particularly close partner for Rational and do
               we see any changes there, and then the second part, follow on
               with that, can you mention how Rational and their product line
               may be wrapped into Eclipse initiative that's getting a lot of
               traction of theirs, are there any plans to bring some of the
               Rational products into the Eclipse initiative/


Mills:         Let me just check this off and then turn over to Mike and we can
               easily comment on Eclipse since Rational does participate very
               significantly in the Eclipse open source initiative. The IBM
               company today does deliver software on Windows. In fact we have a
               multibillion dollar software business on the Windows environment
               today. We're a first class




                                                                              20


               participant on that platform. We support Microsoft interfaces.
               Our products fit into that world and we're very successful there
               and we're realizing very good growth there. So in that sense you
               should not look at Rational's existing relationship on Windows as
               being fundamentally different than IBM's participation in that
               platform. And with that said I'll turn it over to Mike.


Devlin:        Thanks Steve. I agree and this is primarily customer-driven,
               right so we need to support the platform that the customers are
               using and their different applications. As Steve said it's a
               heterogeneous world and the goal here is to provide the best
               possible solution without being exclusionary. I would expect that
               the relationship with Microsoft will continue to be very
               important still, and with respect to Eclipse as Steve said we're
               a founding board member and we've been involved in Eclipse since
               day one and our products are very much aligned with the Eclipse
               strategy.


Clacell:       Ok great. And then this is more along a legal standpoint. Both
               companies have fairly large market share in the development
               communicate HSR review; have you sort of thought of how long
               that's going to take and any particular steps that you may need
               to take to satisfy their requirements?




                                                                              21


Devlin:        Well we will go through the process as always. We're comfortable
               with the relative position of both companies and of course the
               development tool market is many times larger than the combined
               revenues of both IBM and Rational in the tool space. It's one of
               the most diverse segments of the market, one of the least
               concentrated parts of the software market so we're comfortable
               that we'll be able to provide all the necessary information so
               the government can go through that process.


Clacell:       Great.


Parks:         Thanks. Next question please.


Micaela:       Thank you. Our next question is coming from Don Young of UBS
               Warburg. Please go ahead sir.


Young:         Yes, thank you and good morning. First question on the valuation
               of 2.1 billion. Is that, how are you resolving the $500 million
               convertible. Is that included in that valuation? The second
               question is what are you going to do with the embedded business,
               which the real time embedded position at Rational has which
               doesn't seem to fit with Steve Mills and your orientation. And I
               guess the third question, it doesn't seem fair to be beating you
               up on valuation when the stock is down from 70 to 10 but still
               when you look at the valuation of what you're paying it could be
               as much





                                                                              22


               as 30 times peak earnings for Rational and looking at going
               forward it would appear that there's some risk to losing some of
               the Rational revenues or the support of some of the existing
               partners who are competitors at IBM so I'm wondering if there,
               how do you offset that and get back to the kind of earnings to
               make this minimally dilutive. And then the fourth and last
               question is for Mike about the whole concept of moving from being
               in a point product play at Rational being part of a total
               solution at IBM. Does he see a change in the marketplace where
               being by themselves Rational had a harder time ahead enjoying
               what a company like IBM in a full portfolio of offerings is
               critical to share gains in the new environment that we're in.


Mills:         Well let me start off here. The 2.1 billion is obviously gross
               value. We've talked here about synergies. These transactions in
               the software business are very much focused on synergistic
               benefit and the realization of cash flows from combined sales in
               the two companies that we think are going to be very exciting for
               us as far as increased market penetration. The growth
               opportunities are pretty obvious when you look at the synergies
               both at the product level and at the industry and geographic
               levels of the market. You raise the point on pervasive. We have a
               very large and have had for years a very large pervasive embedded
               software business. Today I have products that run on smartcards,
               PDAs, cell phones, I'm a major




                                                                              23


               provider to automotive companies, I'm embedded in appliances.
               This has been a very important investment area for us. We have a
               substantial portfolio of software and a very large number of
               design wins in the embedded market and so I'm quite excited about
               Rational's participation in that market and how the Rational
               tools can enhance the total end to end platform value proposition
               for pervasive embedded devices. And so we're quite excited about
               the synergies in the pervasive space for us. Mike?


Devlin:        Thanks Steve. And on this issue it's clearly a big transition for
               us moving from an independent company to being part of the IBM
               family. However it's clear we've been able to execute quite well
               as an independent company established in a very strong market
               leadership position in the four spaces that we serve and been
               able to maintain an increased market share consistently so we
               believe we've established that position and clearly this is an
               opportunity for acceleration for us against often driven by
               customers. We went through a phase about six or seven years ago
               in the tools business of some consolidation anyway. Rational is a
               key driver in that. And I think this is a logical progression of
               the industry over the next couple of years.


Young:         Steve, to follow up do you say the 2.1 billion includes the 500
               million deferred?




                                                                              24

Mills:         That's the calculation on the $10.50 a share on the shares
               outstanding.


Parks:         So Steve on a net cash basis this is about $1.7 million.


Mills:         Right.


Parks:         Next question please. Thanks Don.


Miceala:       Thank you. Our next question is coming from Tony Sakanagi of
               Sanford Bernstein. Please go ahead.


Sakanagi:      Yes, thank you. Hi Steve and Mike. Rational's current operating
               margins for the last four quarters have been about 10 percent.
               That's significantly lower than about the 25 percent margin that
               you enjoy Steve in your software division overall. Can you
               comment on whether there are any rationalization exercises that
               need to be done within the division to make this similar or
               creative on an operating profit basis for IBM or is your belief
               that simply greater volumes over time will help and then if you
               could just help me put this in context. I think this is now your
               sixth acquisition in software in counter 2000. We know what
               Rational's revenues have been for the last 12 months. Can you
               comment on whether there is material revenue from your other five
               acquisitions? Informix was





                                                                              25

               I guess 2001 so just the other five acquisitions in 2002 as we
               think about our models going forward.


Mills:         Obviously on our reported profit margins are a mix of our whole
               product line and all the things that we do. As we look at this
               acquisitions we obviously see synergies so we believe that the
               combined companies are going to be able to generate more revenue
               with the same number of people in development in sales that we
               have today. We think the synergies are going to drive an
               improving revenue stream at obviously at a fixed level of cost
               and expense that's going to drive incremental profits the bottom
               line. That's the way we always look at these transactions as what
               are the synergies and benefits and gains that can be had from
               bringing the two companies together in getting incremental
               leverage on the same base. And we get economies of scale,
               benefits in operations and other administrative activities that
               can also help improve the overall margin contribution. So I'm
               very comfortable with overall financial characteristics of the
               deal. This is again as you said before this is a deal that's
               designed to deliver a tremendous amount of synergy. It will be
               two companies coming together delivering premier build tool set
               design with great platform and manage time function all of which
               we think gives us a superior solution in the marketplace for
               medium and large businesses to build the kinds of applications
               they're trying to build going forward.




                                                                              26



Parks:         Thanks Tony. We'll take one more question now.


Miceala:       Thank you. Our next question is coming from Steve Milonovich of
               Merrill Lynch.


Milonovich:    Thank you. Steve, could you comment on where those real synergies
               are in terms of the benefit of owning Rational as opposed to just
               working with Rational that has made them redirect their resources
               in ways that you see big payoffs. And I wonder if you'd be
               willing to comment on some of the big deals you've done,
               historically, Lotus, Tivoli, Informix and rank them to some
               degree in terms of how successful they've been, where this fits
               in, and if there's anything you've learned from previous
               acquisitions that you would apply to Rational to make it even
               more successful.


Mills:         Well let me take the back end of your question first which I
               think relates to the second part of Tony's question as well. The
               approach we've taken over the last couple of years with
               acquisitions is to move quickly to integrate into the
               organization. That does not mean a loss of skill, talent,
               technology, all those things are obviously retained in the
               organization but the operation of these acquisitions as separate
               entities hasn't proven to fit with what the customers want. The
               customers want a consistency of value, proposition, support,
               follow through, dedication and they want the products to
               complement each other. Now this simple idea of an





                                                                              27


               environment in which build and run and manage are coordinated in
               terms of the capabilities that are built into the products so
               that one supports the next. The build tools very easily and
               seamlessly and effectively support the run time environments and
               then the management tools can easily be applied to manage the
               environment. Lot of emphasis here on integration and ease of and
               seamlessness which is not to say that you're trying to build a
               ball of twine architecture but rather work on the smoothing out
               of the connections and improve the overall effectiveness of the
               end to end solution. That is something that is extremely hard to
               do purely from a partnership perspective. As far as the industry
               has gone with open standards the fact of the matter is that
               particularly down in these deep infrastructure kinds of products,
               having the development teams work closely together to optimize
               the solution for the customer, to integrate it, to test it and
               deliver it as a package represents profound leverage for the
               customers who in fact incur much more money in their labor spent
               around these products than they do on the products themselves.
               And so the ease of and the integration is critical to the return
               on investment and time to return the customers are looking for in
               products. That's what drives the marketplace today. Time to get a
               return. And so this acquisition allows us to do that between the
               two teams both on the development side but obviously it allows us
               to take a joint value proposition to the marketplace. So as you
               look at things that we've done here with acquisitions like




                                                                              28


               Crossworlds, Informix, Access 360, the range of acquisitions
               we've done over the last couple of years, we are integrating
               these things rapidly to deliver the value proposition the
               customer wants. And that has proven to be dramatic in its
               relative impact and its ability to help us drive market share. We
               are driving significant increases in market share in security,
               management, enterprise application integration, database because
               we're not operating around a bucket of bolts approach, we're
               operating around an integrated platform approach, delivering the
               customers real near term value in the product line.


Parks:         Thank you Steve and thank you all in participating in our call
               and have a great weekend.





In connection with the merger, Rational publicly filed a definitive proxy
statement and has filed and will file other relevant documents concerning the
transaction with the Securities and Exchange Commission (SEC). STOCKHOLDERS OF
RATIONAL ARE URGED TO READ THE DEFINITIVE PROXY STATEMENT AND ANY OTHER RELEVANT
DOCUMENTS FILED WITH THE SEC BECAUSE THEY CONTAIN IMPORTANT INFORMATION.
Investors and security holders can obtain free copies of the definitive proxy
statement and other documents by contacting Investor Relations, Rational
Software Corporation, 18880 Homestead Road, Cupertino, CA 95014 (Telephone:
(408) 863-9900). Rational began mailing the definitive proxy statement to its
stockholders on December 24, 2002. In addition, documents filed with the SEC by
Rational are available free of charge at the SEC's web site at www.sec.gov.

     Information regarding the identity of the persons who may, under SEC
rules, be deemed to be participants in the solicitation of stockholders of
Rational in connection with the transaction, and their interests in the
solicitation, is set forth in the definitive proxy statement that was filed
by Rational with the SEC on December 23, 2002.

Forward-Looking Statements

     Except for historical information contained herein, statements contained
in this document may constitute "forward looking statements" within the
meaning of the Private Securities Litigation Reform Act of 1995. These
statements are neither promises nor guarantees, but involve a number of risks,
uncertainties and other factors that could cause actual results to differ
materially from those set forth in the forward-looking statements, including,
without limitation, the risk that the merger may not be consummated in a
timely manner, if at all, risks regarding employee relations and other risks
concerning IBM and Rational and their respective operations that are detailed
in the periodic filings with the SEC of IBM and Rational, including their most
recent filings on Form 10-K or Form 10-Q.