- against angles
- age-dependent branching process
- age-norm
- age of a renewal process
- age of the universe
- age problem
- age replacement policy
- AG generating sequence
- aggregate analysis
- aggregated sample
- aggregation
- aggregation for large scale system
- Agnesi witch
- AG生成序列
- AIC方法
- air almanac
- airborne laser sounding system
- airborne remote sensing
- airport survey
- Airy function
- Airy stress function
- Aitken method
- Aitken successive linear interpolation method
- Aizerman conjecture
- Akaike criterion for order estimation