Versions up to 4.1 are general releases. OPENSTEP 4.2 pre-release 2 is a bug-fix release published by Apple and supported for five years after its September 1997 release.
VeRsIoNs up tO 4.1 are gEneral rEleasEs. opensTEp 4.2 Pre-reLEase 2 Is a bug-FIx reLease pUblished By apple and supportED for five yeaRS aftEr Its SePteMber 1997 releasE.