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Mellon optical memory was an early form of computer memory invented at the Mellon Institute (today part of Carnegie Mellon University) in 1951. The device used a combination of photoemissive and phosphorescent materials to produce a "light loop" between two surfaces. The presence or lack of light, detected by a photocell, represented a one or zero. Although promising, the system was rendered obsolete with the introduction of magnetic-core memory in the early 1950s. It appears that the system was never used in production.

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  • La memoria óptica Mellon fue uno de los primeros tipos de memoria de computadora, inventada en el Instituto Mellon de Investigación Industrial (hoy parte de la Universidad Carnegie Mellon) en 1951.​​ El dispositivo utilizó una combinación de efecto fotoeléctrico y materiales fosforescentes para producir un «bucle de luz» entre dos superficies. La presencia o falta de luz, detectada por una fotocélula, representaba un uno o un cero. Aunque prometedor, el sistema quedó obsoleto con la introducción de la memoria de núcleo magnético a principios de la década de 1950. Parece que el sistema nunca se usó en producción. (es)
  • Mellon optical memory was an early form of computer memory invented at the Mellon Institute (today part of Carnegie Mellon University) in 1951. The device used a combination of photoemissive and phosphorescent materials to produce a "light loop" between two surfaces. The presence or lack of light, detected by a photocell, represented a one or zero. Although promising, the system was rendered obsolete with the introduction of magnetic-core memory in the early 1950s. It appears that the system was never used in production. (en)
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  • La memoria óptica Mellon fue uno de los primeros tipos de memoria de computadora, inventada en el Instituto Mellon de Investigación Industrial (hoy parte de la Universidad Carnegie Mellon) en 1951.​​ El dispositivo utilizó una combinación de efecto fotoeléctrico y materiales fosforescentes para producir un «bucle de luz» entre dos superficies. La presencia o falta de luz, detectada por una fotocélula, representaba un uno o un cero. Aunque prometedor, el sistema quedó obsoleto con la introducción de la memoria de núcleo magnético a principios de la década de 1950. Parece que el sistema nunca se usó en producción. (es)
  • Mellon optical memory was an early form of computer memory invented at the Mellon Institute (today part of Carnegie Mellon University) in 1951. The device used a combination of photoemissive and phosphorescent materials to produce a "light loop" between two surfaces. The presence or lack of light, detected by a photocell, represented a one or zero. Although promising, the system was rendered obsolete with the introduction of magnetic-core memory in the early 1950s. It appears that the system was never used in production. (en)
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  • Memoria óptica Mellon (es)
  • Mellon optical memory (en)
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