SQ

SQ, Sq, or sq may stand for:

Arts and entertainment

• Shakespeare Quarterly, a literary journal since 1950
• Space Quest, an adventure video game series, 1986–1995
• A fictional society in the Infinity Ring, a 2011–2015 book series
• SQ, a 1978 short story by Ursula K. Le Guin

Businesses and organizations

• Singapore Airlines (IATA:SQ)
• Block, Inc., a financial services company (NYSE:SQ)
• Sûreté du Québec, a Canadian police force

Psychology

• Social intelligence quotient, a statistical abstraction of social intelligence
• Systemizing quotient, a measure of a person's neurological tendency to systemize

Science and technology

• SQ (program), a program for compressing files on MS-DOS and CP/M
• Sound quality, the characteristics of the output of a preamp, amp or sound system
• Stereo quadraphonic, a matrix quadraphonic gramophone record format developed by CBS
• Subcutaneous injection, in medicine

Other uses

• sq. ('square'), in a unit of area
• Albanian language (ISO 639-1:sq)