The Cathode Ray Tube site
- Describes facts behind the development of CRT, Roentgen, camera tubes. Includes background information of Crookes, Geissler and Ruhmkorff. Includes photos of antique models.
- http://members.chello.nl/~h.dijkstra19/

Regency TR-1 Transistor Radio History
- Explains the process that two companies went through to develop and finally mass produce some of first battery radios in the early 1950's. Features photos of the new product and early circuit design [pdf]. Includes history by Regency co-founder John
- http://www.regencytr1.com/

A Thumbnail History of Electronics
- An outline of developments with capsule biographies of important figures.
- http://www.ee.umd.edu/~taylor/Electrons.htm