An outline of developments with capsule biographies of important figures.

A biography of Marconi's personal assistant. Includes list of patents and photo gallery.

1997 was the 50th anniversary of the invention of the transistor. Here is its history written by the lab where it was invented.

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 Pies and related web links.