STOS BASIC is a dialect of the BASIC programming language for the Atari ST personal computer. It was designed for creating games, but the set of high-level graphics and sound commands it offers is suitable for developing multimedia software without knowledge of the internals of the Atari ST.
STOS BASIC was developed by Jawx–François Lionet, and Constantin Sotiropoulos–and published by Mandarin Software (now known as Europress Software).