'''S3''' is a [[structured programming|structured]], [[Imperative programming|imperative]] [[high-level language|high-level]] [[computer programmingprogrmming|computer]] [[programming language]].<ref>{{cite book|title=Software engineering environments|publisher=North-Holland Pub. Co.|year=1981|edition=illustrated|last=Hünke|first=Horst|isbn=978-0-444-86133-7|page=83}}</ref> It was developed by the UK company [[International Computers Limited]] (ICL) for its [[ICL 2900 Series|2900 Series]] mainframes. It is a [[system programming language]] with syntax influenced by [[ALGOL 68]] but with data types and operators aligned to those offered by the 2900 Series. It was the implementation language of the [[operating system]] [[ICL VME|VME]].
