Legend:

AL:  Alias - Studio	OC:  OpenCascade
CT:  Dassault - CATIA	OD:  CoCreate - OneSpace Designer
IC:  ITI - CADDS	PE:  PTC - Pro/Engineer
ID:  ITI - I-DEAS	SY:  T-Systems - COM/FOX
IN:  Autodesk - Inventro	Tx:  Theorem - CadVerter
	UG:  UGS - Unigraphics