The Atari ST is a home/personal computer that was commercially available from 1985 to the early 1990s. It was released by Atari Corporation in 1985. The "ST" officially stands for "Sixteen/Thirty-two",[1] which referred to the Motorola 68000's 16-bit external bus and 32-bit internals.


The Atari ST was part of the 16/32 bit generation of home computers, based on the Motorola 68000 CPU, with 512KB of RAM or more, and 3½" floppy disks as storage. It was similar to other contemporary machines which used the Motorola 68000, the Macintosh and the Commodore Amiga. Although the Macintosh was the first widely available computer with a graphical user interface (GUI), it was limited to a monochromatic display on a smaller built-in monitor. Preceding the Amiga's commercial release by almost two months,[2][3] the Atari ST was the first computer to come with a fully bit-mapped color GUI[4], using a version of Digital Research's Gem released that February.[5] It had an innovative single-chip graphics subsystem (designed by Shiraz Shivji) which shared the full amount of system memory, in alternating clock cycles, with the processor, similar to the earlier BBC Micro and the Shared Memory Architecture systems that have become common today. It was also the first home computer with integrated MIDI support.

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Atari Falcon Branch
Preceded by
Atari 8-bit
Atari ST Followed by
Atari Falcon
Elixir (Win) Branch
Preceded by
Atari ST Followed by

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