QS

QS may refer to:

• Travel Service IATA airline designator
• ATCvet code QS Sensory organs, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products
• 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 satis
• Quality Score
• 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
• Quinolinate synthase, an enzyme
• QS mark (quality and safety) on Chinese products