OS/2 Timeline

A brief timeline of OS/2. The information pertains to IBM OS/2 releases. Microsoft OEM releases had slightly different release dates and feature sets.

 

  • OS/2 1.0—December 1987—Originally CP/DOS
    • Joint IBM-Microsoft development
    • 16-bit protected-mode, multi-threaded, multi-tasking OS
    • Segmented virtual memory
    • 286 CPU and about 1.5 MB RAM required
    • Maximum 32MB partition size
    • FAT filesystem only
    • Text mode, DOS-like interface
    • Single DOS box support
  • OS/2 1.1—November 1988—Codename Trimaran
    • Presentation Manager graphical user interface (codename Winthorn)
    • Support for larger than 32MB partitions
    • 3-4 MB RAM minimum
  • OS/2 1.2—October 1989—Codename Sloop
    • Installable Filesystem (IFS) support
    • HPFS filesystem included
    • Improved Presentation Manager
    • Dual Boot capability
    • REXX and IPF support
  • OS/2 1.3—December 1990—Codename Cutter
    • Lowered resource requirements (2 MB RAM)
    • ATM font support
    • Developed primarily by IBM
  • OS/2 2.0 LA—October 1991—Limited Availability
    • Internal revision 6.167 (91/10/08)
    • Pre-release version of OS/2 2.0
    • Only for selected IBM customers
  • OS/2 2.0—April 1992—Codename Cruiser
    • Internal revision 6.307 (92/03/01)
    • 32-bit protected-mode, multi-threaded, multi-tasking OS
    • Paged virtual memory
    • 386 CPU and 4 MB RAM required
    • Multiple DOS boxes
    • Win-OS/2 support (based on Windows 3.0)
    • System Object Model (SOM) support
    • Workplace Shell (WPS) graphical interface
    • Boot Manager included
    • Limited hardware support
  • OS/2 2.00.1—October 1992—Codename Riker
    • Only preleoaded on IBM hardware
    • 32-bit Graphics Engine (GRE)
    • XGA-2 support
    • Similar to Service Pak XR06055
  • OS/2 2.1—May 1993—Codename Borg (previously Yawl)
    • Internal revision 6.514 (93/04/12)
    • Improved non-IBM hardware support
    • APM and PCMCIA support
    • MMPM/2 included
    • Win-OS/2 based on Windows 3.1
  • OS/2 for Windows—November 1993—Codename Ferengi
    • Used pre-existing Windows 3.x instead of Win-OS/2
    • New drivers for S3 based cards
    • Largely unchanged from original 2.1 release
  • OS/2 2.11—February 1994
    • Internal revision 6.617 (94/01/28)
    • Also available as Service Pak XR06200 for OS/2 2.1
    • Bugfix release
  • OS/2 2.11 SMP—July 1994
    • Symmetric Multiprocessing (SMP) support
    • Up to 16 CPUs supported
    • Only sold with SMP hardware
  • OS/2 Warp—October 1994—Codename Warp
    • Internal revision 8.162 (94/09/19)
    • Performance tuned, lower resource requirements
    • Compatible with Windows 3.11
    • BonusPak (with Internet Access Kit) included
    • Improved hardware support
    • Updated WPS
  • OS/2 Warp Connect—May 1995
    • Internal revision 8.209 (94/11/09)
    • Networking support included (MPTS, TCP/IP, LAN Requester)
    • Peer-to-peer networking
  • OS/2 Warp, PowerPC Edition—December 1995
    • IBM Power Series hardware support
    • Based on MACH microkernel
    • Not sold in retail
  • OS/2 Warp Server 4—February 1996
    • Combined OS/2 Warp and LAN Server
    • Entry and Advanced editions (the latter with HPFS386)
  • OS/2 Warp 4—September 1996—Codename Merlin
    • Internal revision 9.023 (95/11/07)
    • Updated WPS, new look and feel
    • Java 1.0.1 and JDK included
    • VoiceType included
    • OpenGL (software renderer only) support
    • OpenDoc included
  • OS/2 Warp Server Advanced SMP—September 1996
    • Warp Server 4 Advanced with SMP support
  • WorkSpace On-Demand 1.0—November 1997—Codename BlueBird
    • Based on OS/2 Warp 4
    • Required OS/2 Warp Server
    • RIPL remote boot
    • Centralized client deployment and management
  • WorkSpace On-Demand 2.0—October 1998
    • Added fully diskless PXE client boot support
    • Improved client manageability
    • Easier management through the LAN Server GUI
  • OS/2 Warp Server for e-Business—April 1999—Codename Aurora
    • Internal revision 14.039F
    • JFS filesystem support
    • Limited 32-bit device driver support
    • High memory support (more than 512 MB per process)
    • Improved internationalization
    • NetFinity 5.2 included
    • Lotus Domino Go Webserver 4.6 included
    • WebSphere Application Server 1.1 included
    • Version 4.50
  • OS/2 Convenience Pack 1—November 2000—Known as MCP/ACP
    • Based on WSeB kernel
    • Java 1.1.8 included
    • Programmer’s Toolkit included
    • Version 4.51
  • OS/2 Convenience Pack 2—November 2001—Known as MCP2/ACP2
    • Last OS/2 release
    • Refreshed in April 2002
    • IBM Web Browser included
    • Java 1.3 included
    • Innotek Flash included
    • Version 4.52

5 Responses to OS/2 Timeline

  1. CP2 refresh was a separate release in (roughly, from memory) May of 2002… it was labeled CP2 PF (as in Post Fix).

  2. michaln says:

    The CP2 refresh files are dated April 2002 I believe. I wouldn’t call it a separate release exactly, as I don’t believe it introduced any new features. After applying a fixpack or two, there is probably no discernible difference between the two CP2 editions, or is there?

  3. Lucas says:

    Why there is nothing about ecomstation here? Basically it’s OS/2

  4. Michal Necasek says:

    It’s not a museum piece… yet. Also finding exactly what was released and when is a lot harder than with IBM’s stuff.

  5. Pingback: First Research Paper – Revisited | scotta13blog

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