Aries - Constellation
Ariprandus - Flourished, 12th century - Authority cited in pre-1607 legal work (DSA)
Arizona Cardinals - National Football League - 1994-present (NFLA)
Academic Research Infrastructure
Accelerated Research Initiative (SAUO)
Accruing Return Investments - Business term
Acid Regular Insulin - Medicine (EDAA)
Acne Research Institute (EA)
Active Retirees in Israel - An association
Activity Routing Indicator (MCD)
Actuarial Removal Interval (AFIT)
Acupuncture Research Institute (EA)
Acute Respiratory Illness - Medicine (DMAA)
Acute Respiratory Infection - Medicine
Add Register Immediate Instruction (VLIE)
Advanced Resources International, Inc. - Commercial firm
Aerial RADIAC Instrument
Aerodyne Research, Inc.
Aeronautical Radio, Inc. (KSC)
Aeronautical Radio Incorporated (SAUO)
Aero Vics SA de CV - Mexico - ICAO designator (FAAC)
African Research Institute - La Trobe University - Australia
Aging Research Institute - Defunct (EA)
Agricultural Research Institute (EA)
AIDS Research Institute - University of California, San Francisco (RCD)
Aileron Rudder Interconnect (MCD)
Airborne Radio Installation - RADAR
Airborne Radio Instrument
Air-Conditioning and Refrigeration Institute (EA)
Aircraft Radio Instrument (SAUS)
Airpower Research Institute - Air University - Research center (RCD)
Air Resources, Inc. (EFIS)
Airway Reactivity Index - Physiology
Alcoholic Rehabilitation Inc. (SAUO)
Aldose Reductase Inhibitor - Organic chemistry (DAVI)
Allied Research Institute - Later, Aluminum Recycling Association (EA)
Alternate Rod Insertion - Nuclear energy (NRCH)
Alternative Resources, Inc. - Commercial firm
Aluminium Research Institute (SAUS)
Aluminum Research Institute
Aluminum Roofing Institute (SAUS)
Amaryllis Research Institute (EA)
American Rayon Institute - Defunct
American Reciprocal Insurers (SAUO)
American Refractories Institute (SAUO)
American Reliance Group (EFIS)
American Renaissance Initiative - Harrisburg, PA (PACS)
American-Russian Institute (SAUO)
Analytical Resources, Inc. (EFIS)
Animal Rights International (EA)
Annual Recurrence Interval (SAUS)
Anxiety Reaction, Intense (SAUS)
Applications Reference Index (SAUS)
Applied Research, Incorporated (ACAE)
Appraisal of the Regional Impact (EURO)
Approved Research Institute
Aquaculture Research Institute - University of Idaho (RCD)
Aquatic Research Institute (EA)
Archaeology and the Religion of Israel - A publication (BJA)
Arden Realty - NYSE symbol (SPSG)
Arden Realty Group - NYSE symbol
Arden Realty, Inc. - NYSE symbol (SAG)
Arica - Chile - Airport symbol (OAG)
Arica - Chile - Seismograph station code, US Geological Survey (SEIS)
Aricraft Radio Instrument (SAUS)
Aries (SHCU)
Aries (automobile) - NCIC car model code
Arikara - Language code (ETLW)
Arisaka - NCIC firearms make code (NCIC)
Arithmetic (DNAB)
Arizona
Arlington Special Editions - NCIC boat manufacturer code (NCIC)
Army Research Institute
Army Research Institute for the Behavioral and Social Sciences - Alexandria, VA
Asbestos Related Illness
Asian Rural Insitute-Rural Leaders Training Center (SAUO)
Association Resource Institute - Commercial firm (EA)
Astoria, OR - Amtrak Busline code
Attribute Requirement Inventory
ATWS - Anticipated Transient without Scram Rod Injection System - Nuclear energy (NRCH)
Audience Reaction Indicator (IIA)
Audience Research Institute - Also, AIPO (NTCM)
Australasian Religion Index - A publication (APTA)
Authority Is Requested to Inter - the remains of - Army (AABC)
Autism Research Institute
Automated Readability Index (MCD)
Automatic Radio Information - System which relays traffic information through car radios
Automatic Return Items (AABC)
Automatic Room Identification (SAUS)
Automobile Road Information - Traffic management
Automotive Recyclers of Indiana (SRA)
Average Recurrent Interval
Average Relationship Index
Aviation Restructive Initiative - Army aviation (MLEX)
Ayn Rand Institute (EA)
Interoceanic Regional Authority (SAUO)
Otter Airboats, Welaka, FL - Manufacturer code for watercraft hull identification number (USCG)
Rimbey Public Library, Alberta - Library symbol - National Library of Canada (NLC)