Complex sentence: The IBM System/36 (often abbreviated as S/36) was a small computer system marketed by IBM from 1983 to 2000-a multi-user, multi-tasking successor to the System/34.
Split into simpler sentences: The IBM System/36 (often abbreviated as S/36) was a minicomputer marketed by IBM from 1983 to 2000. It was a multi-user, multi-tasking successor to the System/34.