William Shockley and others invent transistor, which will replace the vacuum tube and allow miniaturization of electronic devices

Low definition color images transmitted between Washington and New York.

J. L. Baird demonstrates television in public, using a mechanical scan system.

Flourescent screen CRT used as a receiver in a television system

John Flemming invents diode vacuum tube

Valdemar Poulsen invents Telegraphon, the first magnetic recorder.

William Crookes developes the Crookes tube, a precursor of the cathode ray tube