os 400 By deek Aug 26, 1988 0S/400 V1R1 Nov 25, 1988 OS/400 V1R1M2 Oct 27, 1989 OS/400 V1R2 Sep 28, 1990 OS/400 V1R3 May 24, 1991 OS/400 V2R1 Mar 6, 1992 OS/400 V2R1M1 Sep 18, 1992 OS/400 V2R2 Dec 17, 1993 OS/400 V2R3 May 4, 1994 OS/400 V3R0M5 Nov 25, 1994 OS/400 V3R1 Jun 21, 1995 OS/400 V3R2 Dec 22, 1995 OS/400 V3R6 Nov 9, 1996 OS/400 V3R7 Aug 29, 1997 OS/400 V4R1 Feb 27, 1998 OS/400 V4R2 Sep 11, 1998 OS/400 V4R3 May 21, 1999 OS/400 V4R4 Jul 28, 2000 OS/400 V4R5 May 25, 2001 OS/400 V5R1 Aug 30, 2002 OS 400/V5R2 Jun 11, 2004 i5/OS V5R3 Feb 14, 2006 i5/OS V5R4/5.4 Mar 21, 2008 i5/OS V6R1/6.1 Oct 23, 2009 IBMi 6.1.1 Apr 23, 2010 IBMi 7.1 May 2, 2014 IBMi 7.2 Apr 15, 2016 IBMi 7.3 Jun 21, 2019 IBMi 7.4 May 10, 2022 IBMi 7.5
