Berkeley Systems was a San Francisco Bay Area software company co-founded in 1987 by Wes Boyd and Joan Blades.

It made money early on by performing contract work for the National Institutes of Health, specifically in making modifications to the Macintosh so that it could be used by partially sighted or blind people.

Berkeley Systems' best-selling product, the trivia game You Don't Know Jack, was developed by Jellyvision, based on their award-winning children's educational film "The Mind's Treasure Chest".

You Don't Know Jack brought that program's model of interactive learning, engaging structure and pacing, and host character into the commercial mainstream.

[3] Vivendi Universal’s subsequent acquisition of Sierra, and a host of similar enterprises, enjoined diverse competing sales and marketing departments with one sole directive: sell Web banner advertisements.