ACE Stands For : Adverse Clinical Event | Automated Commercial Environment | A Ceased Explosion | Adaptive Communication Environment | Aerobatic Competency Evaluator | Air Combat Element | Air Force Airborne Command Element | Airborne Command Element | Airborne Communications Electronics | Allied Command Europe | Analysis and Control Element | Armored Combat Earth-mover | Armored Combat Excavator | Army Combat Earth-mover | ASAS (All-Source Analysis System) Collateral Enclave | Assistant Chief of Engineers | Aviation Career Education | Aviation Combat Element | Aviation Combat Element | Aviation Council Emeritus | AviÌ?n de Combate Europeo | Advanced Composition Explorer | Apollo Checkout Equipment | Adverse Childhood Experiences | Active Cornering Enhancement | Air Cleaning Engine | Airport Capacity Enhancement | Area Control Error | AGOA Capacity Enhancement (US Department of Commerce Fellowship) | Assessing Cost-effectiveness | Aviation Combat Element