Before flatscreens
Before flatscreens became so common, Cathode Ray Tubes were the go-to device for display, television, computer monitors, radar screens, etc...
Here is an excellent site giving both history and reference data. It also covers other electron discharge devices such as X-Ray tubes, Geissler tubes and vidicon camera tubes.
Check out
The Cathode Ray Tube site
Posted by DaveH at February 25, 2014 7:24 PM