QED
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QED can mean several different things:
- Q.E.D. Latin Quod erat demonstrandum, used at the end of mathematical proofs
- The QED project intended to construct a formalized database of all mathematical knowledge
- The QED text editor program
- Quantum electrodynamics, a field of physics
- Quantum Effect Devices, a maker of MIPS architecture microprocessors which was acquired by PMC-Sierra in 2000.
- QED (book) (1985), by Richard Feynman
- QED (play), by Peter Parnell about Richard Feynman
- Q.E.D. (1903), by Gertrude Stein, published as Things As They Are (1973)
- Q.E.D. (manga), a detective manga by Katou Motohiro.
- Quantum Explosion Dynamo, an object in the computer game Commander Keen
- QED (TV Series) a British science documentary series.