QED
# QED

QED may refer to:

## Mathematics and science

* Q.E.D. (quod erat demonstrandum), 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

## 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)
* 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. (U.S. TV series)
* Q.E.D. (UK 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
