Each type of logic gate has a logic symbol that conveys its logic function but does not indicate the electronic circuitry involved. The use of these symbols in circuit diagrams simplifies the understanding of a complex logic circuit and means that technological advances in electronics need not be taken into account.
Logic gates based on fluid logic have been successfully used as have optical switches used as logic gates. See also logic circuit, digital logic, multivalued logic.
"logic gate." A Dictionary of Computing. . Encyclopedia.com. (August 20, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/logic-gate
"logic gate." A Dictionary of Computing. . Retrieved August 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/logic-gate