Shortly after UNIX System V Release 4 was produced, AT&T sold all its rights to UNIX to Novell. Dennis Ritchie likened this sale to the Biblical story of Esau selling his birthright for the mess of pottage. Novell developed its own version, UnixWare, merging its NetWare with UNIX System V Release 4. Novell tried to use this as a marketing tool against Windows NT, but their core markets suffered considerably. It also quickly settled the court battles with BSDi and Berkeley.