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

See also

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