001: 2628
003: Starlibrary PMS 4.5
005: 20180420
020: ^a0-07-065050-0
066: ^aro.D
072: ^abasic logic gates
082: ^a621
100: ^aroger l.tokheim
240: ^aDigital principals
245: ^aDigital principals
260: ^c1994
650: ^abinary codes
650: ^anumbers used in digital electronics
650: ^atitle