ISO 5784-1:1988

This part defines graphical symbols for binary logic and gives some rules concerning their use in circuit diagrams. Symbols given in this part shall be used for all documents and circuit diagrams concerning logic and related functions for data processing. Includes examples of association of elementary symbols. The form A symbols are in accordance with IEC Publication 617-12 and are to be preferred; the form B symbols, although currently used, are not preferred for future use.