Wan, neurasthenic, and either unbelievably skinny, or hideously fat, the pen-protector-wearing, calculator-toting, virginity-still-havin', Complicatus Dos tottered palely through the Paleolithic Era.

The Complicatus Dos lived anywhere the sun didn't shine (except where you're thinking right now Ms. Dirty-mind) that included electrical outlets. With permanently cramped hands, an even more cramped social life, and a perpetually idiotic short-sighted stare caused by the 9-inch monochrome monitors of the time, the Complicatus Dos was the bane of every cocktail party, except on the occasions it served as an hors doeurvre.

Incapable of conversation with other dinosaurs, the Complicatus emitted a high-pitched cheeping sound similar to a cockroach in heat (That's a cockroach in hot weather! Pervert.). Unable to go more than three sentences without throwing in inexpressively boring technical talk ("Pentium 8, 300,000 megahertz, 18 gigs RAM running at 10 nanonseconds! And it's overclocked!") the Complicatus was undoubtedly the result of some sort of birth-defect, since it is very difficult to imagine them ever reproducing themselves.

Paleontologists have many theories on why the Complicatus Dos became extinct, but most agree that it was a darned good thing . Some claim it was a system failure; Others say it was shame - The Dos' closest relative was it's Config.sys, and she always claimed she was an only child; Still others think it caught a hacking cough; While even others think that the Complicatus was eventually supplanted by the far mightier Complicatus Macintosh. In any case, the last known evidence of the Complicatus Dos was apparently a suicide note which read, simply, "General Failure reading Drive A. Abort, Retry, Fail?"

Oh, yeah, they also spent a lot of time doing stupid-computer tricks like writing useless books on extinct things.