IBM LAN Server
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IBM LAN Server is an extended version from Microsoft LAN Manager shipped in early 1988 for first time. It was designed to run on top of Operating System/2 Extended Edition. The network client is called IBM LAN Requester and was included with OS/2 EE 1.1 by default.
Version history:
1.0 - 1988 - for OS/2 EE 1.0
1.2 - 1990 - for OS/2 EE 1.2
1.3 - 1991 - for OS/2 EE 1.3
2.0 - 1992 - based on LAN Manager 2.0
3.0 - 1993 - Entry / Advanced
4.0 - 1994 - Entry / Advanced
5.0 - included in OS/2 WarpServer
5.1 - included in OS/2 WarpServer for e-business