
1) Type of RAM
Found on
https://www.crosswordclues.com/clue/williams-tube

The Williams tube, or the Williams–Kilburn tube after inventors Freddie Williams and Tom Kilburn, developed in 1946 and 1947, was a cathode ray tube used as a computer memory to electronically store binary data. It was the first random-access digital storage device, and was used successfully in several early computers. Williams and Kilburn appli...
Found on
http://en.wikipedia.org/wiki/Williams_tube

(from the article `Williams, Sir Frederic`) British electrical engineer who invented the Williams tube store, a cathode-ray-tube memory system that heralded the beginning of the computer age....at the University of Manchester, and Kilburn accompanied him in order to help develop an electronic storage system for electronic computers. They ....
Found on
http://www.britannica.com/eb/a-z/w/39
No exact match found.