- qualitative theory of differential equations
- qualitative traits of forage plants
- quality
- quality acceptance
- quality acceptance of underground opening
- quality-adjusted life year
- Quality-adjusted life year，QALY
- quality analysis for product
- Quality and Reliability
- quality assessment of airborne electromagnetic survey
- quality assessment of landscape architecture projects
- quality assurance
- quality assurance for environmental monitoring
- quality assurance (QA)
- quality assurance, QA
- quality assurance system of river engineering
- quality attribute
- quality audit
- quality base method
- quality benefits
- quality by design
- quality category of heat flow data
- quality chain
- quality characteristic
- quality characteristic deviation