The Unified Modelling Language (UML^TM) and the SysML^TM systems engineering extension are developed by members of the Object Management Group (OMG^TM), an international, not-for-profit computer industry consortium. To find out more about the OMG^TM please visit:

http://www.omg.org

There is also a good description on the Wikipedia:

http://en.wikipedia.org/wiki/Object_Management_Group

Dr Darren wishes to thank the OMG^TM for their continuing contributions through their specifications and conferences, and hopes that this eSchool contributes to all UML^TM and SysML^TM users.