"Unix standardization efforts are ongoing. No that's not a misprint. Unix is far from dead, and efforts to provide a degree of standardization for the remaining Unix players may well be a lifeline.
"Then again, according to at least one analyst, new Unix standards, though important, may not necessarily be everything.
"A defining aspect of what actually makes Unix Unix is conformance with The Single Unix Specification, a set of specs that constitutes a Unix-conformant system. The idea behind this specification is that, with some form of standardization in place, independent software vendors (ISVs) can develop or port applications that will work on a Unix system..."