The IBM MT/ST (Magnetic Tape/Selectric Typewriter) is a model of the IBM Selectric typewriter itegrated with magnetic tape recording and playback facilities and built into its own small desk.[1] It was released by IBM in 1964.[2][3] It recorded text typed on magnetic tape, 25 kilobytes per cassette tape,[1] and allowed editing and re-recording during playback. It was the first system marketed as a word processor.[3] Versions with two tape drives enabled features such as mail merge.[3]
In 1967, Jim Henson was contracted by IBM to produce and direct a short film on the MT/ST; the film, called Paperwork Explosion,[4] was scored by Raymond Scott.[3]
The MT/ST became obsolete in the 1970s in favor of floppy disk-based systems.[2]