A*

A* or A star may refer to:
 * A* search algorithm, a pathfinding algorithm used in computing
 * A*, the highest grade in examination systems such as the GCE Advanced Level
 * A*STAR, the Singapore Agency for Science, Technology and Research
 * AStar, the Eurocopter AS350 Écureuil helicopter
 * Class A star, a star of spectral class A
 * Sagittarius A*, a radio source at the center of the Milky Way, believed to be a supermassive black hole