QS is a code for:
- Smart Wings IATA airline designator
- Travel Service (Czech Republic) IATA airline designator
- a term for sytemic flow in cardiology
- ATCvet code QS Sensory organs, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products
QS is an abbreviation for any of the following:
- Quacquarelli Symonds, an education and careers networking company
- Quality start, a baseball statistic calculated for starting pitchers
- Quantity surveyor
- Quantified Self
- Queen's Scout
- Queen's Serjeant, an obsolete legal position in the United Kingdom
- Quicksort
- Quadraphonic Sound, or originally Quadphonic Synthesizer a matrix quadraphonic gramophone record format developed by Sansui (also called RM = Regular Matrix)
- Quality System (QS) Regulation
- Quantum sufficit
- Quantum satis
- Quorum sensing
- Québec Solidaire
- Quadratic Sieve
- Quis separabit?, a Loyalist motto
- Qualcomm Stadium, a stadium in San Diego, California and the home of the San Diego Chargers
- Quickscope, a tactic used with sniper rifles in many First-Person Shooters.
- Quality Safety, the compulsory certification system of China.