National Abbreviations and Acronyms
- AAArrow of Achievement
- AABEAmerican Association of Blacks In Energy
- AACArchive Awareness Campaign
- AADBAmerican Association of Deaf-Blind
- AAEFAfrican American Experience Fund
- AAHPERAmerican Alliance for Health, Physical Education and Recreation
- AAHPERDAmerican Alliance Fom Health Physical Education Recreation and Dance
- ABAAmerican Book Award
- ABAAmerican Book Awards
- ABAAmerican Bridge Association
- ABAAsian Basketball Associstion
- ABCAssisting Bioethics Committees
- ABIAgro-Biotechnology Institute
- ABNTAssociacao Brasileira De Normas Tecnicas
- ACDAgricultural Credit Department
- ACEAcademic Competition Enterprises
- ACEAdvancing Care Excelleece
- ACERTArizona Council for Enhancing Recreation & Tourism
- ACESAlliance for Computing At Extreme Scale
- ACESDVArizona Coalition To End Sexual and Domestic Violence
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