See http://www-306.ibm.com/software/rational/

Has been purchased by IbmCorporation for US $2.1 Billion as of December 6, 2002. 
--StevenNewton

''A good thing... now we should get better Linux support out of them.  As an independent company, Rational had the habit of asking "how high?" every time Microsoft said "jump".''

Products:
* List, A to Z
** http://www-306.ibm.com/software/rational/sw-atoz/
* RequisitePro
* RationalRose
* Other stuff to get you to use the RationalUnifiedProcess. ''Isn't it the other way --  RUP is something to get you to buy all the tools in the Rational suite?''
--AnonymousCoward
* Development Conference 2007
** http://www-306.ibm.com/software/rational/events/rsdc2007/