Quad

Quad may refer to:

An abbreviation for "quadruple" or four in many contexts, as in "quad exhaust pipes"

• Quad indicates four artillery guns in a single mounting
• Quad (more commonly Quads), four of a kind in poker

Architecture

• Quadrangle (architecture), for example on a university campus
  • Blue Boar Quadrangle
  • David R. Francis Quadrangle, University of Missouri
  • Memorial Quadrangle
  • Mob Quad, Merton College, Oxford
  • Peckwater Quadrangle
  • Quadrangle (Harvard), Harvard University
  • Quadrangle (Springfield, Massachusetts)
  • Radcliffe Quadrangle, University College, Oxford
  • Schenley Quadrangle, University of Pittsburgh
  • Tom Quad
  • University of Alabama Quad
  • UCL Main Building, University College London

Brands and commercial attractions

• Quad Electroacoustics, a British manufacturer of electronic amplifiers, tuners and loudspeakers
• Quadrupel is a strong Belgian beer; quad is similarly used elsewhere for strong beers
• The Quad Resort and Casino on the Las Vegas Strip

International trade

• The Quadrilateral group of finance ministers

Music, theatre and film

• Quad (play), by Samuel Beckett
• Quad (film), a 2015 film
• Quad (music), a musical project by Gary Ramon
• Quad Cinema, art house in New York City
• Quadraphonic sound, four-channel sound
• Quads, a configuration of four tenor drums
• Quad, a film poster in the United Kingdom typically measuring 30 by 40 inches (76 cm × 102 cm)
• The Quads, a British new-wave band
• John Callahan's Quads!, an animated series from Nelvana
• Derby QUAD, an arts centre in Derby, England
• The Quad, a part of the fictional Hogwarts Castle

Places

• Quad Cities, a group of five cities straddling the US Iowa–Illinois boundary

Science and mathematics

• Quadriceps femoris muscle, informally 'quads'
• Quadruplets, or quads, four babies born from one pregnancy
• Quad (unit), unit of energy, short for quadrillion, 10¹⁵ BTU
• Quadrilateralized spherical cube or quad sphere, a mapping scheme for data collected on a spherical surface such as a planet
• QUaD, a microwave telescope at the South Pole
• Quad pill, Elvitegravir/cobicistat/emtricitabine/tenofovir, an HIV medicine combining four drugs
• Quadrupole in mathematics
• Quadrupole ion trap in mass spectrometry
• Quadrupole mass analyzer in mass spectrometry
• 4-tuple (Quadruple), a list or sequence with four elements

Society and religion

• Quadrangle Club, one of the ten eating clubs at Princeton University
• BU Quad, student publication of Boston University started in 2009

Sports

• Quad scull, a boat configuration of four rowers
• Quad, a chairlift in skiing which carries four persons
• Quad (figure skating), a figure skating jump with four revolutions
• Quad skates, roller skates with two wheels on each of two axles
• Quad, type of surfboard containing 4 fins
• Quad, round-robin tournament with four participants

Technology

• Quad antenna, a directional antenna
• Quad-core, a multi-core processor with 4 cores
• Quad precision, quadruple-precision floating-point format
• Quad Flat Package, a type of package for surface mounted integrated circuit
• Quad, an abbreviation for a type of videotape recorder, especially 2" Quadruplex videotape, with four heads
• Quad, telecommunication term for four conductors used to form two balanced pairs
  • Star quad, a type of telecommunications quad
• Quadraphonic sound, or four-channel sound
• Quad (typography), a spacer used in letterpress type, and later the term for a number of sizes of spaces
• QUAD (cipher), a stream cipher
• Quad store, extra metadata to a RDF triple in a named graph
• Quadrilateral, in the context of computer graphics: a polygon with four sides

Vehicles

• Jeffery Quad, a four wheel drive truck manufactured by the Thomas B. Jeffery Company
• Quad, a muscle car with a four-barrel carburetor
• Quad, a tandem bicycle with four seats
• Quad bikes, four-wheeled all-terrain vehicles
• Quad, or speeder, a motorized vehicle used for maintenance of ways on railroads
• Quad, the nickname of the Morris C8 artillery gun tractor
• Quad (rocket), an autonomous rocket by Armadillo Aerospace
• Quadruple combination fire apparatus that features a pump, tank, hose, and a full complement of ground ladders
• An abbreviation for quadracycle, a human powered vehicle with four wheels
• Quadcopter, a four-rotor helicopter