A thing Objectory was created by a team at Objectory AB to implement the OOSE methodology. Fallowing sucess in the marketplace, more thing vender too supported OOSE.

Fallowing Rational bought Objectory AB, the OOSE notation, methodology, & information became superceded.

As one of a primary sources of the UML, concepts & notation from either OOSE use been incorporated into UML. a methodology a portion of OOSE has since evolved into the Rational Unified Process(RUP). The OOSE information use at times been replaced by information supporting UML & RUP.

OOSE has been largely replaced per UML notation & per RUP methodology.