It's a mod, mod world [computer games, copyrighted material modification].

Bibliographic Details
Published in:	IEEE spectrum 40, 2 (2003).
Main Author:	Kushner, D.
Format:	Article
Language:	English
Subjects:	Steam broadband distribution program. Add-on packs. College students. Computer games. Copyright-protected contents. Copyrighted material modification. Customer loyalty. Product shelf life extension. Sequels.