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QL may refer to:

  • A two letter abbreviation for Queensland, Australia
  • QL (chemical), the chemical isopropyl aminoethylmethyl phosphonite, a precursor to the nerve agent VX (NATO code)
  • .QL, an object-oriented query language used to retrieve data from relational database management systems
  • Query language, computer languages used to make queries into databases and information systems
  • Bedford QL, a three-ton military 4x4 truck by Bedford Vehicles
  • Philips QL, an induction lighting system by Philips, see electrodeless lamp
  • Sinclair QL, a 1980s home and personal computer by Sinclair Research Ltd
  • Quake Live, a 2010 first-person shooter video game in development by id Software
  • Queen Latifah (born 1970), American rapper
  • Aero Lanka (IATA airline designator: QL)
  • '' Quantum Leap (TV series), a television program
  • Quadratus lumborum muscle, a muscle in the lower back
  • Le Québécois Libre, a political webzine
  • ATCvet code QL (Antineoplastic and immunomodulating agents), a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products
QL (chemical)

Isopropyl aminoethylmethyl phosphonite (NATO designation QL), also known as O-(2-diisopropylaminoethyl) O'-ethyl methylphosphonite, is a precursor chemical to the nerve agent VX.