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See also: Appendix:Variations of "a"
- An academic grade, higher than A. Where it is used, it is often the best class of result.
- An academic grade higher than A+
- (computer science) A best-first graph search algorithm for finding a lowest-cost path to a goal.
- (academic grade): Guardian article explaining A* grade
- (search algorithm): Generalized best-first search strategies and the optimality of A*