Timeline History of Operating System/2

By Hartmut Frommert

Timeline

 * 1985:ADOS project
 * 1985-1986:Developing versions called NEWDOS, DOS 5, DOS 286, Big DOS, CP/DOS, developed from DOS 3.2 and MT-DOS.
 * 1987 December:OS/2 1.0 SE.
 * Announced with the PS/2 in April, and delivered in December 1987. 16-bit system for 80286 protected mode, multitasking, memory management, protection, dynamic linking, (incomplete) 16-bit API, DOS support


 * 1988:OS/2 1.0 EE. Communications (SNA, X.25, LAN Manager), database (Query manager, SQL)
 * 1988:OS/2 1.1 SE. Presentation Manager (PM)
 * 1989:OS/2 1.1 EE. Remote database
 * 1989:OS/2 1.2 SE. High Performance File System (HPFS), Installable File System (IFS)
 * 1990:OS/2 1.2 EE. Better PM, TCP/IP and Ethernet
 * 1990:OS/2 1.3 SE.
 * 1991:OS/2 1.3 EE.
 * 1992 March:OS/2 2.0. First 32-bit system. 32-bit API, paging, Workplace Shell (WPS). Multiple DOS (and Windows 3.x) sessions.
 * 1993:OS/2 2.1.
 * OS/2 for Windows.


 * 1994:OS/2 2.11.
 * OS/2 Warp 3.


 * 1995:OS/2 Warp Connect 3.
 * 1996 November:OS/2 Warp 4.