选数管（选数管是早期数字计算机存储设备，由Jan A. Rajchman和团队在RCA公司研发。选数管未能生产商业可用的产品，因此至今仍不为大众所知）
英英释义
abstract:
1
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, of television technology fame.