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The '''[[wikipedia:Atari ST|Atari ST]]''' was a microcomputer developed by Atari Corporation in the mid 1980's. It was announced in January of 1985, and released in June of that year. It runs on the Motorola 68000 CPU. "ST" stands for sixteen/thirty-two, in reference to the 16-bit external bus and 32-bit internals of the [[POS_(Pong_Consoles)_CPUs_and_Other_Chips#68k_CPUs|68000 chip]]. It ran Digital Research's GEM (Graphical Environment Manager) on Atari's proprietary TOS (The Operating System).
The computer primarily competed with the Macintosh and the Amiga in most markets. At the time, Macs were solely monochrome, and Amigas were solely color. The ST straddled the two worlds, offering separate color and monochrome screens, auto-detected by the computer's display circuitry. The monochrome screen was excellent and high-resolution for the era, giving a non-interlaced output of 640x400 at 70Hz and providing credible competition for the Macintosh at a much lower price point. It gained a strong foothold in the business and CAD fields.
