The Atari ST is a home computer released by Atari Corporation in June 1985.[1] Development machines were distributed around May 1985[2] and it was available commercially from that summer into the early 1990s. The "ST" officially stands for "Sixteen/Thirty-two",[3] which referred to the Motorola 68000's 16-bit external bus and 32-bit internals. Due to its graphical user inferface, it was known as the "Jackintosh", a reference to Jack Tramiel.