Williams tube

…electrical engineer who invented the Williams tube store, a cathode-ray-tube memory system that heralded the beginning of the computer age.

…storage device—later known as the Williams tube—based on cathode-ray tubes. A working model was completed late in 1947, and by June 1948 they had incorporated it in a small electronic computer that they built to prove the device’s effectiveness. The computer was called the Small Scale Experimental Machine (SSEM) or…