BS 3939-12:1991, IEC 60617-12:1991

Graphic symbols, Symbols, Graphic representation, Circuit diagrams, Logic devices, Logic circuits, Integrated logic circuits, Logic gates, Code convertors, Multiplexing, Arithmetic units, Delay circuits, Shift registers, Digital circuits, Counting circuits, Semiconductor storage, Block diagrams, Boolean algebra, Computer graphics, Computer-aided design, Logical operations