Dimond ring

{{Short description|Early type of computer memory}}

A Dimond ring or Dimond ring translator was an early type of computer read-only memory, created in the early 1940s by T. L. Dimond at Bell Laboratories for Bell's #5 Crossbar Switch, a type of early telephone switch.R. J. Chapuis and A. E. Joel Jr., 100 Years of Telephone Switching, part 2: Electronics, Computers and Telephone Switching (2nd. edition), p. 33, IOS Press 2003.{{cite web|url=http://etler.com/docs/Crossbar/articles/30-AMATranslator.pdf|title=No. 5 Crossbar - AMA Translator|author=T. L. Dimond}}{{cite web|url=http://www.computerculture.org/2012/10/dimond-rings-and-read-only-ropes/|author=Phil Ryals|title=Dimond Rings and Read-Only Ropes}}