In aerial warfare downing five enemy aircraft qualifies a fighter pilot for the unofficial designation of ace. There were 40 American air aces from action during the Korea War alone. Thirty-eight were from the Air Force and one each was from the Navy and Marine Corps

Annual Cycle Energy System. A thermal energy storage system involving a large (10,000 gallon) water storage tank. In the winter, heat is extracted from the thermal mass of the water causing the water to cool and freeze by spring. In the summer, air is blown over the ice for air conditioning, warming the mass for heating again in the winter. Thus far, ACES is just a theory due to the complexities of the heat pumps and insulating sustems which would be required.

Full A full house with three aces and any pair.

Aces II (Advanced Concepts in Electronic Structure Theory) is a computational chemistry package written and maintained by the research group of Rod Bartlett, at the Quantum Theory Project at the University of Florida. It contains an implementation of various electronic structure theory methods related to coupled cluster.

A bet the next roll will be two 1.

Betting that the next roll will be a 2.

A bet that the next roll will be two ones.

Betting that the next roll will be the total sum of 2