sid

A short form of the male given names Sidney and Siddhartha.

Alternative form of Syd (“unisex given name”).

A minor river in East Devon, England, which flows into the English Channel at Sidmouth.

sadiki

Abbreviation of security identifier.

If the call to this function fails, you can assume the SID was invalid — even if it's a well-known SID.

Sound Interface Device, a sound chip used in some early computers.

Initialism of standard instrument departure.