AAAC: All Africa Anesthesia Congress
AABF: Africa-Asian Business Forum
AACL: Anti Aging Conference London
AARC: African American Residence Caucus
AAUC: AVImark Annual User Conference
ABEC: Annular Bearing Engineers' Committee
ACAF: Asia Computer Animation Festival
ACC: Asthmatic Children's Conference
ACFA: Asian Committee for Future Accelerators
ACFE: Australian Christian Forum on Education
ACFS: American Custom Figure Symposium
ACGIH: American Conference of Governmental Industrial Hygienists
ACGM: Annual Clinical Genetics Meeting
ACGM: Annual Convention and General Meeting
ACI: Automatic Channel Installation
ACLE: All China Leather Exhibition
ACM: Association for Computing Machinery
ACMC: Australasian Computer Music Conference
ACOH: Asian Conference of Occupational Health
ACPL: Asheron's Call Player Luncheon
ACPN: Asian Conference of Pediatric Nutrition
ACR: Active, Confirmed, Registered
ACRM: American Congress of Rehabilitation Medicine
ACSE: Automatic Control and System Engineering
ACSM: American Congress of Surveying and Mapping
ACTE: Annual Convention and Career Tech Exposition
ADAS: Annual Diagnosis Arthritis Symposium
ADCS: Australasian Document Computing Symposium
ADE: Amsterdam Dance Event
ADHOC: Advanced Developers Hands-On Conference
AERC: Adult Education Research Conference
AFCE: Annual Fraud Conference and Exhibition
AFCS: Annual Frequency Control Symposium
AFMC: Asia Film Market Conference
AFOC: ASEAN Forum on Coal
AFTC: Agricultural and Food Transporters Conference
AFTC: Atlantic Fisheries Technology Conference
AHIC: Arabian Hotel Investment Conference
AIMS: Anderson Island Mystic Seaport
AITC: Annual Information Technology Conference