American Bible Society; ABS
American Association for the Advancement of Science; AAAS
American National Standards Institute; ANSI
Proceedings of the National Academy of Sciences of the United States of America; PNAS
American Civil Liberties Union; ACLU
American Civil Liberties Union; ACLU
American Association for Artificial Intelligence
Export-Import Bank of the United States; EIB
American Meteorological Society; AMS
American Society for Microbiology
American Institute of Physics; AIP
American Psychological Association
American Automobile Association
American Geographical Society; AGS
National Futures Association
American Society for Cell Biology; ASCB
Association of American Medical Colleges; AAMC
Association of American Medical Colleges; AAMC
American Thoracic Society; ATS
Humane Society of the United States
American College of Pathologists
American Accounting Association
American Bankers Association; ABA
Geological Society of America; GSA
American Academy of Neurology
American Society for the Prevention of Cruelty to Animals; ASPCA
American College of Surgeons; ACS
US Pharmacopeial Convention
American Public Health Association
American Society of Hypertension; ASH
American Society of Civil Engineers; ASCE
American Academy of Pediatrics; AAP
American Association of Public Accountants
American Economics Association
American Academy of Orthopaedic Surgeons; AAOS
American Water Works Association; AWWA
American Academy of Ophthalmology
American Political Science Association
Insurance Institute for Highway Safety
US National Library of Medicine; NLM
US Geological Survey; USGS
American Geological Institute
American Institute of Architecture
American College of Dentists; ACD
American Chemistry Council; ACC
American College of Nutrition; ACN
American Society of Nephrology; ASN
Association of American Railroads; AAR
American Bar Association; ABA
American College of Radiation Oncology; ACRO
Planned Parenthood Federation of America
MPAA; American Film Institute; AFI
American Petroleum Institute; API
American Library Association
American Hospital Association; AHA
West Point military-academy
American Arbitration Association; AAA
Department of Homeland Security; DHS
American Society for Testing Materials; ASTM
Pharmaceutical Manufacturers Association (pn)
Pharmaceutical Research and Manufacturers of America; PhRMA
United States Military Government of the Ryukyu Islands (1945-1950)
U.S. postal service; UNITED STATES POST OFFICE
United States Civil Administration of the Ryukyu Islands (1950-1972); USCAR
American depositary receipt; ADR