What does Ar stand for?

Arabic (BEE)

Arabinoside

Arakhin - or Arakin (BJA)

Aramaic (ADWA)

Arche - A publication (SAUS)

Archidiaconus - Authority cited in pre-1607 legal work (DSA)

Arena - A publication (SAUS)

Argon - Preferred form, but also see A - Chemical element

Ariprandus - Flourished, 12th century - Authority cited in pre-1607 legal work (DSA)

Aristophanes - Greek playwright, c. 445-380BC - Classical studies (OCD)

Arkansas Library Commission, Little Rock, AR - Library symbol - Library of Congress (LCLS)

Arsendinus de Forlivio - Authority cited in pre-1607 legal work (DSA)

Aryl - Chemistry

Against All Risks - Marine (EBF)

All Rail - Marine (EBF)

All Risks - Marine (EBF)

Analyzed Reagent (SAUS)

Arabian Peninsula - MARC geographic area code - Library of Congress (LCCP)

Aromatic - Chemistry

Arrival (ADWA)

Arrive (WDAA)

Arsenophyrite (SAUS)

Ascensio Recta - Right Ascension - Latin

Aberdeen & Rockfish Railroad Co. - AAR code

Absorption Rate (MELL)

Academic Ranking (EDAC)

Accelerated Reaction (MELL)

Accelerated Reader

Accelerator Research (SAUS)

Acceptable Risk - Toxicology

Acceptance Readiness (NASA)

Acceptance Requirement

Acceptance Requirements (ACAE)

Acceptance Review (NASA)

Accept-Reject Rule - Statistics

Access Register - Computer science (DINT)

Accomplishment Ratio (ADA)

Accounting Review - A publication (BRI)

Accounting Routine (SAUS)

Account Representative (TIMI)

Accounts Receivable - Accounting

Accounts Register - Computer science

Accumulating Reproducer (SAUS)

Accumulative Register (SAUS)

Accumulator Register - Computer science

Achievement Ratio

Acid Resisting - Technical drawings

Acid Rutile (SAUS)

Acknowledgment of Receipt - Message handling - Telecommunications

Acne Rosacea - Medicine (MELL)

Acomb Reunion (EA)

Acoustic Reflex

Acoustic Research International (SAUO)

Acquisition RADAR

Acquisition Request (IUSS)

Acrosome Reaction - Fertilization

Acrylic Rubber (EDCT)

Actinic Reticuloid Syndrome - Medicine (DMAA)

Action Register

Activation Request

Active Range (MCD)

Active Rate (SAUS)

Active Resistance - Occupational therapy

Active Routine (SAUS)

Activity Report (MCD)

Activity Resume (SAUS)

Actual Range (IAA)

Actual Reality (WDAA)

Adaptive Research Corp. - Commercial firm

Addend Register (SAUS)

Additional Requirements (DLA)

Addition Register (SAUS)

Address Range (SAUS)

Address Register (CMD)

Adherence Ratio - Medicine (DMAA)

Administration Report (FOTI)

Administrative Record (BCP)

Administrative Request (SAUS)

Administrative Requirement (SAUS)

Administrative Rule (SAUS)

Administrative Ruling - US

Admiralty Representative (SAUS)

Admitting Room (MELL)

Adrenergic Receptor - Physiology

Advanced Reactor (KSC)

Advanced Readiness (MCD)

Advance Reading (SAUS)

Advance Release (SAUS)

Adverse Reaction - Medicine (DB)

Advice of Receipt

Advisory Report (SAUS)

Aerial Reconnoiterer (SAUS)

Aerial Resistance (SAUS)

Aerodynamic Report

Aeronautical Radio (IAA)

Aeronautical Radio-navigation (SAUS)

Aeronautical - or Aircraft Requirement - Military (MCD)

Aeronautical Research (IAA)

Aeronca Manufacturing - ICAO aircraft manufacturer identifier (ICAO)

Aero Repair (MCD)

Africa Report - A publication

After Right (SAUS)

Aft Right (MCD)

Agencja Robotricza - Press agency - Poland

Agent Report (MCD)

Age Regression (MELL)

Age Replacement

Agricultural Research

Air and Radiation Division - Environmental Protection Agency (GFGA)

Airborne Receiver

Air Conditioning and Refrigeration Program - Association of Independent Colleges and Schools specialization code

Aircraft Ready (AFIT)

Aircraft Rocket (NVT)

Airman Records - Air Force (AFM)

Airman Recruit

Air Radio - Special duties officer - British

Air Receive

Air Reconnaissance (IAA)

Air Refueling

Air Register - Combustion emission control

Air Regulator

Air Requirement (SAUS)

Air Rescue

Air Reserve

Air Resistance

Airship Rigger

Airway Resistance - Medicine (MELL)

Alarm Reaction - Psychology

Alarm Report (VLIE)

Alberta Reports - A publication (SAUS)

Alcohol Related (MELL)

Aldehyde Reductase - Medicine (DB)

Aldose Reuctase - Enzyme - Medicine (EDAA)

Alfa-Romeo - Society of Automotive Engineers auto manufacturer code for service information interchange

Alkali Reserve - Medicine (EDAA)

Allard Register (EA)

Allegheny Region

Allergic Reaction - Immunology

Allergic Rhinitis - Medicine

Allocated Reserve

Allocation Register (SAUS)

Allowance Regulations (SAUS)

Alloy Restoration - Medicine (DMAA)

All Rail - Railroad

All Risks - Insurance

Aloud Rehearsal - Medicine (EDAA)

Alphabetic Register (SAUS)

Alphanumerical Reader (SAUS)

Alphanumeric Representation (SAUS)

Altesse Royale - Royal Highness - French

Altitude Return (ACAE)

Amateur (Radio) Station - ITU designation (CET)

Ambiguity Resolver (SAUS)

Amendment Request - Navy

American Rationalist - A publication (SAUS)

American Recorder - A publication (SAUS)

American Record Guide - A publication (SAUS)

American Reports - A publication (DLA)

American Review - A publication (SAUS)

American Rivers (EA)

American Smelting & Refining (SAUO)

American Smelting & Refining Co. (IIA)

America Remembers (EA)

Amilcar Register (EA)

Amphibian Reconnaissance - Military

Amphiregulin - Biochemistry

Amplification Ratio (MCD)

Amplifier (IAA)

Amplifier Research (ACAE)

Amplitude Ratio (VLIE)

Amrinone - Cardiotonic

Analytical Reagent - Chemistry

Analytical Reagent Grade - Medicine (PALA)

Analytic Reaction (AAMN)

Anaphylactoid Reaction - Immunology

Androgen Receptors - Endocrinology

Anger Rape (MELL)

Angle Ranging (ACAE)

Angle Resolved - Physics

Animal Rights - An association - Australia

Anna Regina - Queen Anne

Anno Regni - In the Year of the Reign - Latin

Annual Rate

Annual Register - A publication

Annual Report

Annual Return

Annual Review (NATG)

Annual Reviews (EA)

Anode Reaction

Anodic Reaction (SAUS)

Anomaly Report (MCD)

Answer - Telegraphy (PCTE)

Antenna Resistance (SAUS)

Anterior Resection - Medicine

Anticipatory Response (SAUS)

Antigen Receptor - Medicine (MELL)

Antioch Review - A publication (SAUS)

Antiphonale Sacrosanctae Romanae Ecclesiae

Antiracketeering

AntiRADAR (NATG)

Antireflection

Antireversionary - Method of exhaust control - Automotive engineering

Antiviral Research - A publication (SAUS)

Aortic Regurgitation - Medicine

Aortic Root - Cardiology

Apical Rate - Medicine

Appeal Reports, Upper Canada - 1846-66 - A publication (DLA)

Application Residence (VLIE)

Application Review (IAA)

Application Routine (SAUS)

Applied Research - of ASRA - National Science Foundation

Appointments Register

Approved for Release

Approved Ruling - Football

Arabic

Aramaic - Language, etc. (ROG)

Arcade (WDAA)

Archaeological Reports - A publication (ABAR)

Archaeologiral Report - A publication (SAUS)

Architecture

Architecture and Town Planning (FOTI)

Arcuate - Brain anatomy

Area

Area Altitude Requirement (SAA)

Area of Resolution

Area Redesignation - Environmental Protection Agency

Area Weapon Right (MCD)

Areito - A publication (SAUS)

Argentina - ANSI two-letter standard code (CNC)

Argentina - GeoNet country code (GEON)

Argentina - Federal Information Processing Standard (FIPS) country code (GEON)

Argentum - Silver - Numismatics

Argonne Area Office (SAUO)

Argonne Group (DEEM)

Argus Corp. Ltd. - Toronto Stock Exchange symbol

Argyll Robertson Pupil - Ophthalmology (MAE)

Aridic - Soil biology - Soil moisture regime (QSUL)

Arithmetic Register

Arkansas - Postal code

Arkansas Library Commission, Little Rock (SAUS)

Armagh - County in Ireland (ROG)

Armament (SAA)

Armed RECCE - Reconnaissance - Military (VNW)

Armed Robbery (SAUS)

Armor - Army

Armored Reconnaissance

Armoured Regiment (SAUO)

Armstrong - Tire casing code

Army

Army Receiving-Valve (IAA)

Army Regulation

Army Reserve - Formerly, ERC, ORC

Arnold-Realy - Syndromes - Medicine (QSUL)

Arrangement (SAUS)

Arrested Relaxation - Molecular dynamics

Arrester - Electricity (IAA)

Arrete - Decision, Ordinance, By-law - French

Arrival

Arrival and Return - Shipping

Arsphenamine - Antisyphilitic compound (MAE)

Articulare - Craniometric point

Artificial Respiration - Medicine

Artists and Repertory (SAUS)

Arumanian - Linguistics (IEL)

ASARCO, Inc. - Formerly, American Smelting & Refining Co. - NYSE symbol (SPSG)

Asian Review - A publication (SAUS)

Aspect Ratio

As Received

As Required (AFM)

As Rolled - Technical drawings (DAC)

Assault Rifle (SAUS)

Assembly Routine (SAUS)

Assigned Rating - Sailing

Assigning Range (SAUS)

Assignment Routine (SAUS)

Assistant Registrar (ROG)

Assistant Resident (SAUS)

Assisted Resonance (NTCM)

Assisted Respiration - Medicine (MELL)

Associated Rediffusion - Television

Associated Rediffusion Ltd. (SAUO)

Associate in Retailing

Associative Register - Computer science

Asthma Rhinitis - Immunology

Astrodynamical Report (SAA)

Asynchronous Repeater (SAUS)

Atlantic Records (SAUS)

Atlantic Reporter - A publication (DLA)

Atlantic Resolve - Military technology (DDF)

Atlantic Route - Aviation (FAAC)

Atmospheric Revitalization (MCD)

Atrial Rate - Cardiology

At Risk (MAE)

Atrophic Rhinitis - Medicine (DMAA)

Attack and Release (SAUS)

Attack Reporting - Military

Attendance Record (SAUS)

Attention Routine (SAUS)

Attenuation Reaction

Attributable Risk (MELL)

Attributes for Representing Relationships (VLIE)

Attrition Reserve

Audience Research (NTCM)

Audiological Rehabilitation

Audio Response

Auditor of Receipts

Auditor of Revenue

Aufsichtsrat - Supervisory Board - German

Augmentation Reaction (SAUS)

Augmentation Reliability (MCD)

Augmented Reality (VLIE)

Augmented Roman (ADA)

Augustinian Recollect Fathers (SAUO)

Augustinian Recollect Sisters - An association - Australia

Ausgleichrechnung (SAUS)

Austin Rover - British-built automobile

Authority Record - Database terminology (NITA)

Authors' Registry

Automated Radioimmunoassay

Automated Reagin - Serology

Automatic Radio Manufacturing Co., Inc.

Automatic Reader (SAUS)

Automatic Register/Reverse (VLIE)

Automatic Restart (SAUS)

Automatic Resupply (NVT)

Automatic Rifle - or Rifleman - DoD

Automatic Rifleman (SAUS)

Autonomous Republic

Autoradiographic

Autoradiography - Medicine (DAVI)

Autorefraction (SAUS)

Autoregressive - Mathematical bioscience

Autosomal Recessive - Genetics

Auxiliary Routine (IAA)

Availability Rate

Average Rating

Average Revenue

Average Rust - Fuels and lubricants

Aviation Radionavigation (SAUS)

Aviation Radionavigation, Land - FCC (IEEE)

Avionic Requirements (SAUS)

Avionics Requirements (MCD)

Avis de Reception - Return Receipt - French

Awaiting Reply - Telecommunications (TEL)

Axial Ratio (SAUS)

Azimuth Ridge (SAUS)

Bomber - Russian aircraft symbol

Egypt - IYRU nationality code (IYR)

Handmaids of the Sacred Heart of Jesus for Reparation (TOCD)

Industrial Arbitration Reports - A publication (SAUS)

Ontario Appeal Reports - A publication (DLA)

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

Repair Ship - Navy symbol

Stanlabs, Inc. - Research code symbol

Superior Court Administrative Rules (SAUO)