As with all Debian release names thus far, the Sid distribution takes its name from a ToyStory character. Sid is the kid next door who breaks his toys and makes nasty creatures of them.

SID is perhaps also an acronym which stands for "Still In Development.", and a warning.

While other release code names (such as Potato or Woody) progress in time from being DebianTesting to being DebianStable, Sid is forever doomed to being DebianUnstable. See also DebianStability (DebianStable and DebianTesting).

See also: