PQ may refer to:
Politics and Law
- Parti Québécois, a provincial political party in Quebec, Canada
- Parliamentary question, a question posed during Question Time in a Westminster system legislature
Geography
- Province of Quebec, the largest province of Canada. The abbreviation PQ was replaced by QC in 1992
- An informal abbreviation for Rancho Peñasquitos, San Diego
Military
- A code for a series of Arctic convoys of World War II
Transportation
- Pilot Qualified
- An IATA airline designator for Panafrican Airways
Math and Science
- Plastoquinone, a molecule used in the electron transport chain in the light-dependent reactions of photosynthesis
- Precision Questioning, a communications theory
- PQ, a very simple formal system
Business
- In project management, PQ is an abbreviation for the Performance Qualification
Computers
- Page Quality, a ranking system where visitors review sites by casting votes
- Picture Quality, see Video quality
- Police Quest, an adventure game series
- PowerQuest, producer of computer HDD software tools for the DOS/Windows platform
- Productivity Quality Systems, an SPC and quality control software company
- PQ Systems a statistical process control software company
- Progress Quest, a parody computer game
- PQ: Practical Intelligence Quotient, a video game
- Puzzle Quest: Challenge of the Warlords, a video game
- Priority queuing, a data packet scheduling technique
- libpq, a C library for the PostgreSQL database
Music
- Power Quest, a British power metal band
- Promenadorquestern, the official student orchestra of the Royal Institute of Technology
Law
- p.q., pro querente. For the plaintiff; also usually abbreviated, pro quer
Other
- Play Quotient, a theory pertaining to individuals and the characteristics of toys, games and other playthings
- Power quality, the set of limits of electrical properties