The Atari 520ST was a personal computer released in 1985, notable for being the first to feature a bitmapped colour graphical user interface (GUI) and built-in MIDI ports, making it especially popular among musicians.
This one is in very good condition.
A wide range of software was developed for the ST, including popular applications for desktop publishing (Calamus, PageStream), 3D graphics (Cyber Studio CAD-3D), and numerous games. The ST was used in various fields, from small business desktop publishing and CAD in Germany to a cheaper alternative to Digital VT220 terminals in offices.