QE can stand for:
Royalty:
- Queen of England (disambiguation)
- Queen Elizabeth, several queens, including:
- Queen Elizabeth I of England
- Queen Elizabeth II of England
Schools and hospitals:
- Queen Elizabeth School (disambiguation), several schools, including:
- Queen Elizabeth's School, Wimborne Minster, in Winborne Minster, Dorset, England
- Queen Elizabeth Sixth Form College, in Darlington, County Durham, England
- Wyggeston and Queen Elizabeth I College in Leicester, England
- Queen Elizabeth Hospital Birmingham in England
- Queen Elizabeth Hospital, Hong Kong
Transportation:
- Queen Elizabeth Way, a highway in Ontario, Canada
- Queen Elizabeth class aircraft carrier, a class Royal Navy ships
- The IATA airline designator for Crossair Europe
Economics:
- Quantitative easing, a monetary policy intended to stimulate an economy is recession
- Quantum economics, a type of monetary economic analysis
Science and engineering:
- Quantum efficiency, a measure of a device's sensitivity to light
- Quality assurance, also known as quality engineering
- Quality Engineering (journal), an academic journal focused on quality assurance
- Query expansion, a technique to provide better search results by automatically adding similar searches
- Quartz Compositor, also known as Quartz Extreme, the windowing system in Mac OS X
Mathematics:
- Quantifier elimination, a technique to simplify formulas
- Quadratic equation, an equation used to solve quadratic equations
Other:
- Qualifying examination, an exam required to continue studies at a higher level