The newest addition to the User Friendly comic strip. Sid is an old and very experienced geek who has spent a lot of his time at Columbia Internet competing with Pitr to prove that he is a better geek. The first program he ever wrote was an AI that answered "yes"/"no" questions by answering "yes" to questions ending in a vowel (much like Pitr's "da"/"nyet" AI). He considers Linux to be a "watered-down version of a real Unix", and prefers other Unix systems.