A/CVI stands for Active or Chronic Viral Infection
A/E/C stands for Architect/Engineer/Contractor
A/FM stands for Air/Firing Mechanism
A-VSB stands for Advanced Vestigial Side-Band
A-VMDP-P stands for Association of Veterinary Medical Data Program Participants (est. 1977)
A-VO2diff stands for Arterial-Venous Oxygen Difference
A-WTD stands for A-Weighted (sound)
A.F.U.D. stands for American Foundation for Urologic Disease (also seen as AFUD)
B-DOFDM stands for Block-Differential Orthogonal Frequency Division Multiplexing
B&AS stands for Brakes and Antiskid (space shuttle)