Abstract
An access control system with a personal computer has been developed for radioisotope facility. The developed system is composed of a NEC PC-9801 UX2 personal computer having two of 1 Mbyte floppy-disk drivers and extended random access memory (2 Mbyte), automatic door and two of non-contact identification card scanners (Nippon ID System Inc. ) . The identification card scan-ners are controlled by the personal computer via RS-232C. By the use of the non-contact identification card, user's name and entrance and leaving times are recorded automatically in a file.
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