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Req Pro was a part of the original Rational suite (Rational Rose, Rational Clear Case). DOORS Was a major competitor to Req Pro, later IBM bought it and renamed it to Rational DOORS. So now you have two requirement tools under IBM. DOORS is generally used by Systems Engineering companies and ReqPro by IT companies. Presently IBM is developing another product based on their open source intiative - jazz.net; which is called Rational Requirements Composer. RRC can be considered next generation version of ReqPro
IBM Rational is a service provided by IBM. IBM Rational helps with software and systems development. It is supposed to help software be more profitable and and improve productivity.
IBM Rational Team Concert was created in 2008-06.
IBM Rational Software Modeler was created on 2004-10-13.
IBM Rational Application Developer was created on 2005-01-07.
IBM Rational solution for Collaborative Lifecycle Management was created in 2011-06.
Rational Unified Process
the abbreviation or acronym IBM stands for International Business Machines.
International Business Machines
International Business Machine Corporation
Advanced Interactive eXecutive when referring to IBM.
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