In the United States:

CompUSA, Computer City, Electronic Boutique, Babbages Etc., Walmart, Sam's, Target, Circuit City, Price Costco, Best Buy, Staples, BJ's Wholesale, Fry's, Microcenter, Multimicro, Hastings, Mediaplay, Zany Brainy, Noodle Kidoole, Learning Smith...

In Canada:

Chapters, Future Shop, CompuSmart, Electronic Boutique, Computer City, Office Max...

In the United Kingdom:

Beatties, Byte Computer Superstores, Currys, Dixons, EB, GAME, HMV, John Lewis Partnership, MVC, PC World, Software Plus, Staples, Tempo, Toys R Us, Virgin, WH Smith...

... as well as hundreds of superb independent software outlets around the planet.