What does ABO stand for?

Abaco Marine Inc., Riviera Beach, FL - Manufacturer code for watercraft hull identification number (USCG)

Abon - Language code (ETLW)

Aboriginal (ABBR)

Aborigine (ABBR)

Abortion - Obstetrics (DAVI)

Absent Bed Occupancy - Medicine

Absent Bed Occupancy (or Occupant) (SAUS)

Absent Bed Occupant (MELL)

Accessory Boring Organ - of a gastropod

Accumulated Benefit Obligation (TDOB)

Adiabatic Born-Oppenheimer (TLAA)

Administration by Objectives

Admiralty Berthing Officer (SAUS)

Advanced Byte-Oriented - Computer science (HGAA)

Aeroexpreso Bogota - Colombia - ICAO designator (FAAC)

Affiliated Boards of Officials (EA)

Agents of Biological Origin - Military

Air Base Operability (ACAE)

Air Board Order

American Board of Ophthalmology (EA)

American Board of Opticianry - Later, NAO (EA)

American Board of Orthodontics (EA)

American Board of Otolaryngology (EA)

Annular Beam Oscillator (ADWA)

Antibiotic Ointment (MELL)

Anti-Boat-Obstacle (SAUS)

Antibodies - Immunochemistry (DAVI)

Apparent Body Orientation (PDAA)

Arecibo, PR - Location identifier - FAA (FAAL)

Army Budget Office

Association of British Orchestras (DBA)

Association of British Orientalists

Association of Buying Offices - Defunct (EA)

Astable Blocking Oscillator

Aviator's Breathing Oxygen - Air Force

Blood Typing System (MLEX)

Boyle Public Library, Alberta - Library symbol - National Library of Canada (NLC)

Methotrexate/Bleomycin/Vincristine (DB)