QED may refer to:
Mathematics and science Q.E.D. (), used at the end of a mathematical proof Quantum electrodynamics, a field in particle physics QED manifesto and project, a database of mathematical knowledge QED: The Strange Theory of Light and Matter, a 1985 physics book by Richard Feynman Work (electric field), often represented as W=qEd
Computing and electronics QEMU Enhanced Disk, a deprecated disk image format for machine emulation and virtualization QED (text editor), a 1960s line-oriented editor Quantum Effect Devices, a microprocessor design company
Arts, entertainment, media
Literature Quod Erat Demonstrandum, a 1903 novel by Gertrude Stein Q.E.D. (novel), a 1930 mystery novel by Lynn Brock Q.E.D. (manga), a 1997 manga by Motohiro Katou
Albums QED (band), a 1980s Australian band Q.E.D. (Terje Rypdal album), 1993 Q.E.D. (Jim Allchin album) Q.E.D. (Acid Black Cherry album), 2009 QED Records or Emanem Records
Stage and screen Quod Erat Demonstrandum (film), a 2013 Romanian drama film QED (play), a 2001 play by Peter Parnell about Richard Feynman QED International, a film company
Television KQED (TV), public television station in San Francisco, California, USA; also known as "QED" Q.E.D. (American TV series) Q.E.D. (British TV series) WQED (TV), public television station in Pittsburgh, Pennsylvania, USA; also known as "QED"
Radio KQED-FM (88.5), an NPR radio station in San Francisco, California, USA; also known as "QED" WQED-FM (89.3), an NPR radio station in Pittsburgh, Pennsylvania, USA; also known as "QED"
Other uses Granville Gee Bee R-6, named "Q.E.D.", a 1930s racing monoplane QED: Question, Explore, Discover, annual skeptical conference held in Manchester, UK Quami Ekta Dal, a regional political party in India Quiet Electric Drive, a US Navy program to develop technologies for silent maritime propulsion
See also
KQED (disambiguation), including callsigns KQED -- QED in zone K WQED (disambiguation), including callsigns WQED -- QED in zone W CQED (disambiguation)