I don't know if I've ever gone on about Warp here, but it was one of those evolutionary dead ends that's still interesting nonetheless.
OS/2 was announced with the PS/2 line in April of 1987 (happy 32nd!), and released to manufacturing in early 1988. It was meant from the start to be "a better DOS than DOS", with things like built-in multitasking, a proper user/supervisor divide, multithreading, and (coming soon) its own GUI called Presentation Manager.
But for the longest time, it was simply a curiosity, only meant for developers and die-hard IBM fans. It required a beefier system than DOS did (and keep in mind that turbo XT systems from the early 1980s were viable into the mid-1990s running DOS!), and quite a bit more memory and disk space (both of which were expensive in 1988, and IBM's premium pricing for the PS/2 didn't help).
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