- Artin theorem
- AR-transformation
- AR变换
- AR序列
- ascendant subgroup
- ascendant subgroup of a group
- ascending chain
- ascending chain condition for rings
- ascending chain condition of a poset
- ascending chain condition of module
- ascending chain condition on F-subgroups
- ascending chain of polynomial set
- ascending power formula of trigonometric function
- ascending series
- ASCII码
- aseismatic analysis of structure
- aspherical presentation
- assemble-line balance
- assembler
- assembly drawing
- assembly language
- assertion sign
- assignment in propositional calculus
- assignment of a predicate calculus over an individual domain
- assignment of formula in a predicate calculus over an individual domain