Television  

Encyclopedia of Television - This is the electronic version of the definitive print encyclopedia. It is quite comprehensive.

MZTV Museum of Television - Digital version of a physical museum in Canada, maintained by Moses Znaimer; emphasis on technological developments, with many photos.

Early Television Museum - Dedicated largely to early television sets and other technology, with a database and many images

Popular Culture: Television - Contains many links under various categories, including criticism; from Washington State University

TV Acres - A great source of facts on many television programs, inlcuding character bios; contains many links.

Episode Guides - Lists and summarizes individual episodes for more than 3,500 shows; includes quotes from episodes.

Futoncritic - Guides to current television shows, including frequently-updated breaking news

Crossovers and Spinoffs - Poobala.com's enormous archive of series that crossed over or spun off from others

Television Tunes - Over a thousand TV show theme songs, streaming or downloadable in MP3 format.

How Ultra-high Definition TV works - From howstuffworks.com

How Blu-Ray Discs Work - From howstuffworks.com