1. SynchronouS idle. 2. A Syntactic Specification language for COPS. ["MetalanguageS of the Compiler Production SyStem COPS", J. Borowiec, in GI FachgeSprach "Compiler-Compiler", ed W. Henhapl, Tech HochS DarmStadt 1978, pp. 122-159]. 3. [TCP/IP SYN requeSt?] (1996-04-17)