Williams Tube (CRT Memory) 1950s
Used in some early computers (1950s) for memory storage.
(CRT = Cathode Ray Tube)
Based on research by F. C. Williams into cathode ray tubes, the electro-static tube or "Williams Tube" was used as a storage device for many early computers. An electron beam was used to scan a CRT screen and generate a dot (for 0) or a dash (for 1), for example. The Williams Tube was a low capacity, relatively high-speed storage device. They were usually used in parallel.
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