QA may stand for:
- Qatar, ISO 3166-1 alpha-2 country code
- .qa, the country code top level domain (ccTLD) for Qatar
- Quality assurance, the process or set of processes used to measure and assure the quality of a product
- Quantitative analysis, the application of quantitative techniques such as statistics and stochastics in various areas of data analysis (e.g. finance)
- Qantas, the national airline of Australia
- Question answering, a type of information retrieval
- quantitative analysis (chemistry), the measurements of quantities of substances produced in reactions rather than simply noting the nature of the reactions
- Qualitative inorganic analysis, when shortened to qualitative analysis, can be abbreviated to QA
- Qatar Academy, an International Baccalaureate school in Doha, Qatar
- Qa (Cyrillic), a character used in the Kurdish alphabet
- QA (robot), a two-wheeled balancing telepresence robot developed by Anybots
- ATCvet code QA Alimentary tract and metabolism, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products
- "Qa-1", a form of alloantigen
- Queen Alexandra Hospital, the largest hospital serving the city of Portsmouth.
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