OS/2 Timeline

• 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—December 1991—Limited Availability
  • Internal revision 6.177 (91/12/11)
  • Pre-release version of OS/2 2.0
  • Only for selected IBM customers, officially supported
• OS/2 2.0—April 1992—Codename Cruiser
  • Internal revision 6.307 (92/03/01), XR02000
  • 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
  • Internal revision 6.427 (92/06/03), XR02010
  • 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), XR02010
  • 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
  • Internal revision 6.514 (93/04/12), XR02011
  • 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), XR06200
  • Also available as Service Pak XR06200 for OS/2 2.1
  • Bugfix release
• OS/2 2.11 SMP—July 1994
  • Internal revision S.624 (94/06/09), XR02014
  • 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), XR03000
  • Performance tuned, lower resource requirements
  • Compatible with Windows 3.11
  • BonusPak (with Internet Access Kit) included
  • Improved hardware support
  • Updated WPS
• OS/2 Warp with Win-OS/2—February 1995
  • Internal revision 8.200 (94/11/09), XR03001
  • Same as above but with Windows 3.1 included
• OS/2 Warp Connect with Win-OS/2—May 1995
  • Internal revision 8.209 (94/11/09), XR03003
  • Networking support included (MPTS, TCP/IP, LAN Requester)
  • Peer-to-peer networking
• OS/2 Warp Connect—July 1995
  • Internal revision 8.210 (94/11/09), XR03004
  • Same as above but without Windows 3.1
• 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
  • Internal revision 8.234, XR03005
  • 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, XR04000
  • 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
  • Internal revision 7.029, XR03006
  • Warp Server 4 Advanced with SMP support
  • Free upgrade for Warp Server Advanced licensees
• 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, XR04500
  • SMP support
  • 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
  • Internal revision 14.062, XR04501
  • 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
  • Internal revision 14.086, XR04502
  • IBM Web Browser included
  • Java 1.3 included
  • Innotek Flash included
  • Version 4.52
• OS/2 Convenience Pack 2 Refresh—April 2002
  • Internal revision 14.089, XR04503
  • Last OS/2 release