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OS/2

OS/2 is an IBM operating system for the personal computer that, when introduced in 1987, was intended to provide an alternative to Microsoft Windows for both enterprise and personal PC users. The last version of OS/2 Warp, Warp 4, offered a Netscape-based Web browser that exploited OS/2's speech recognition capability. IBM enhanced OS/2 to provide server functions for e-business .

While OS/2 is still in use, IBM has announced that its support will require a special contract beginning in 2006.

This was last updated in September 2008

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While the OS/2 community is not a very big community the OS/2 operating is still being developed by a small company from the United States called Arca Noae LLC. They licensed OS/2 from IBM and sell it under the name ArcaOS. They are also working on making it even boot on UEFI only hardware.
https://www.arcanoae.com/arca-noae-progress-report-arcaos-on-uefi-only-hardware/
I am currently running ArcaOS on a new Asus 299 gaming pro mainboard wth an I7 and 6 cores active.
(I just wanted to give an hint its not that OS/2 is not that old it can only run on 486 CPU :-)).

Roderick Klein
President OS/2 VOICE foundation
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