History of OS/400
From MidrangeWiki
Revision as of 14:55, 21 August 2007 by MrDolomite (talk | contribs) (→Release life cycle: add table of complete history with dates from IBM)
The operating system, like the hardware of the midrange family, has changed significantly since its release on August 26, 1988 as OS/400 Release 1. The latest version is known as i5/OS V5R4 and was released to general availability on February 11, 2006.
Contents
Predecessors
Release life cycle
| Release | Announce date |
GA date |
Announce end of marketing |
Effective end of marketing |
End of program support |
Program support extension available | |
|---|---|---|---|---|---|---|---|
| Rel 1 | 06/21/1988 | 08/26/1988 | |||||
| V2R1 | 04/22/1991 | 05/24/1991 | 03/12/1993 | 06/30/1994 |
Current releases
Previous release support
Values for TGTRLS parameter
| Installed release |
*CURRENT | *PRV | Other valid values |
|---|---|---|---|
| V5R3 | V5R3M0 | V5R2M0 | V5R1M0 V5R2M0 V5R3M0 |
| V5R2 | V5R2M0 | V5R1M0 | V5R1M0 V5R2M0 [verification needed] |
| V5R1 | V5R1 | V4R5 | V4R4 |
| V4R5 | V4R5M0 | V4R4M0 | V3R2M0 V4R2M0 V4R3M0 V4R4M0 V4R5M0 |
| V4R4 | V4R4 | V4R3 | V4R2 V3R2 |
| V4R3 | V4R3 | V4R2 | V4R1 V3R7 V3R2 |
| V4R2 | V4R2M0 | V4R1M0 | V3R2M0 V3R7M0 V4R1M0 V4R1M4 V4R2M0 |
- from PDF
