选数管
选数管（英语：Selectron tube）是数字计算机存储设备的一种早期形式。选数管是在弗拉基米尔·佐利金（以发明电视机知名）的指导下，由Jan A. Rajchman和他的团队在RCA公司研发的。在磁芯内存开始广泛流行之前，选数管的开发团队并未能够生产出可用于商业的选数管，因此，直到今天，选数管在应用上仍然不为大多数人了解。
Selectron tube
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Selectron tube 选数管
The Selectron was an early form of digital computer memory developed by Jan A. Rajchman and his group at the Radio Corporation of America under the direction of Vladimir Zworykin. It was a vacuum tube that stored digital data as electrostatic charges using technology similar to the Williams tube storage device. The team was never able to produce a commercially viable form of Selectron before core memory became almost universal, and it remains practically unknown today.
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