AF 3 topics · 3 sources ScienceWateracre-feet.Bureau of Reclamation — Bureau of Reclamation Glossary Cite TechnologyDefense(1) Air Force (2) Award Fee.DoD Missile Defense Agency — MDA Glossary Cite TechnologyTelecommunicationsAbbreviation for audio frequency.ATIS — ATIS Telecom Glossary 2007 Cite