What does ABRO stand for?

Able-Bodied Seaman Radio Operator - Navy

American Belarussian Relief Organization - Non-profit (FLAA)

Animal Breeding Research Organisation - British

Animal Breeding Research Organisation (or Organization) (SAUO)

Animal Breeding Research Organization (SAUS)

Army in Burma Reserve of Officers - British military (DMA)

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