QED

• Q.E.D. ({{lang|la|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
• Work (electric field), often represented as W=qEd

• 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

• 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

• QED (band), a 1980s Australian band
• Q.E.D. (Terje Rypdal album), 1993
• Q.E.D. (Jim Allchin album)
• QED Records or Emanem Records

• 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

• 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"

• 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"

• 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

{{canned search|qed}}

• {{srt}}
• KQED (disambiguation), including callsigns KQED -- QED in zone K
• WQED (disambiguation), including callsigns WQED -- QED in zone W
• CQED (disambiguation)

{{disambiguation}}