Page "Unified Modeling Language" Paragraph 15

After Rational Software Corporation hired James Rumbaugh from General Electric in 1994, the company became the source for the two most popular object-oriented modeling approaches of the day: Rumbaugh's Object-modeling technique ( OMT ), which was better for object-oriented analysis ( OOA ), and Grady Booch's Booch method, which was better for object-oriented design ( OOD ).

They were soon assisted in their efforts by Ivar Jacobson, the creator of the object-oriented software engineering ( OOSE ) method.

Jacobson joined Rational in 1995, after his company, Objectory AB, was acquired by Rational.

The three methodologists were collectively referred to as the Three Amigos.