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Shapes standing for boolean functions.
Also known as: Boolean gate symbols, Distinctive shape gate symbols
The set of distinctive shapes representing boolean operations in a logic diagram.
Represent the boolean operations in a circuit or logic diagram.
Contexts: Technical drawing, Software
The inverting circle is a modifier rather than a gate, so the whole set is built from a few shapes plus one composable mark — which is why there is no separate symbol for the negated forms.
Contexts: Technical drawing, Software
A rectangular alternative set exists in the international standard and is used in European practice, so the same circuit is drawn two visually unrelated ways.
The distinctive-shape and rectangular symbol sets are both current.
Contexts: Technical drawing, Software
A flat-backed curve for the disjunction, a rounded rectangle for the conjunction, a triangle for the buffer, with a small circle at an output inverting it.