What does IR stand for?

Current, Reverse (SAUS)

Ice on Runway - NWS (FAAC)

Ice Rinks - Public-performance tariff class - British

Idle Reconnect Fee - Electric utility company

IFR Military Training Route - Aviation (PIPO)

Ileal Resection - Medicine (EDAA)

Illinois Railnet - Federal Railroad Administration identification code

Illumentation Rate (SAUS)

Illumination Rate (CAAL)

Illuminator RADAR (NATG)

Illustration Request

Image Readout - Computer graphics

Image Reconstruction (SAUS)

Image Register (TIMI)

Image Rejection

Imaging RADAR (MCD)

Imaging Radiometer (SAUS)

Imitation Russia - Bookbinding (DGA)

Immediate Relative (SAUS)

Immediate Reserve - Air Force - British

Immortal Riot

Immune Response - Also, Ir - Genetics

Immunization Rate (AFM)

Immunoreactive

Immunoreagent (DB)

Improved Retrofit (CAAL)

Impurity Removal Subsystem (MCD)

Incidence Rate (WDAA)

Incidence Response (CERES)

Incident Report

Inclination of the Ascending Return - Aviation (NASA)

Indent Right - Typography (DGA)

Independent Release (SAUS)

Independent Research (NG)

Indexing Register (SAUS)

Index of Response - Medicine (MAE)

Index Record (SAUS)

Index Register (WDAA)

Index Return - Computer science (DCDG)

In-dial Register (SAUS)

Indiana Railroad System

Indiana Register - A publication (AAGC)

Indian Railways (SAUO)

Indian Reservation (SAUS)

Indian Reserve (SAUS)

Indian Rulings - A publication (DLA)

India Rubber (SAUS)

India-Rubber (DEN)

Indicating Recorder - Electronics (ECII)

Indicator Reading (IAA)

Indicator Ready (SAUS)

Indicator Register (IAA)

Individual Recorder - Sports

Individual Referral (OICC)

Individual Reinforcement (SAUS)

Inductive Resistor (SAUS)

Industrial Kelations (SAUS)

Industrial Registry - New South Wales, Australia

Industrial Relations

Industrial Reports - Australia - A publication

Industrial Robot (ELAL)

Industry Remarketer (CDE)

Infantry Regiment (SAUO)

Inferior Rectus - Muscle - Anatomy

Inflation Rate (SAUS)

Inflight Report (SAUS)

Informal Report

Information and Technology - Educational Resources Information Center (ERIC) Clearinghouse - Syracuse University (PAZ)

Information Rate (SAUS)

Information Reading (SAUS)

Information Region (SAUS)

Information Release (DLA)

Information Report

Information Representation (SAUS)

Information Request (AAG)

Information Requirement - Military intelligence

Information Researchers - Commercial firm

Information Resource (SAUS)

Information Restoring (SAUS)

Information Retrieval - Computer science

Information Retrieval, Infrared (SAUS)

Infrared

Infrared Diffraction (SAUS)

Infrared Light or Infrared Spectrophotometer

Infrared Radiation

Infrared Radiometer

Infrared Reconnaissance

Infrared Reflectance (IAA)

Infra-Red Spectroscopy (EDCT)

Ingersoll-Rand - NYSE symbol

Ingersoll-Rand Co. - NYSE symbol (SPSG)

Ingersoll Rand Company Ltd. - NYSE symbol

Ingram-Rude Information Researchers - Information service or system (IID)

Ingreee Router

Ingress Router - Label switch (TELEC)

Initialized Routine (SAUS)

Initializer Routine (SAUS)

Initial Reactive Results

Initial Release (MCD)

Initial Reports of the Proceedings of ODP - A publication (SAUS)

Initial Reserve

Initiation Region - Genetics

Ink Receptivity

Inland Revenue - British

Inner Roll Gimbal (NASA)

Innovations Representation (SAUS)

Input Reader (SAUS)

Input Register (SAUS)

Input Request (SAUS)

Input Routine (SAUS)

Insane Reality

Inside Radius - Technical drawings

Inside Right - Soccer position

Insoluble Residue

Inspection Record (MCD)

Inspection Rejection

Inspection Release

Inspection - or Inspector's Report

Inspection Request (IAA)

Inspectors Report (SAUS)

Installation Report

Installation Restoration (MCD)

Instantaneous Relay

Instantaneous Release (IAA)

Instant Release - Typography (DGA)

Institute of Refrigeration - British

Institutional Research (SAUS)

Instruction Register - Computer science

Instruction Ring (SAUS)

Instrumentation Report

Instrumentation Requirement (SAUS)

Instrumentation Requirements (MUGU)

Instrumentations Requirements (SAUS)

Instrument Rating - Aviation (PIAV)

Instrument Reading (AFM)

Instrument Register (IAA)

Instrument Restricted Controlled Airspace (DA)

Instrument Route (ACAE)

Insulation Resistance

Intake Restriction - Automotive engineering

Integrated Resources, Inc. (EFIS)

Intelligence Ratio

Intelligence Report

Intelligence Request (DOMA)

Intelligence Requirement - Military

Intelligence Review

Intensive Reading

Interaction Resistance - Plant pathology

Interagency Report (PDAA)

Interface Repository (SAUS)

Interference Refractometer (SAUS)

Intergovernmental Relations (OICC)

Interim Report

Intermediate Range (MCD)

Intermediate Reach (TELEC)

Intermediate Register - Telecommunications (OA)

Intermediate Representation (VLIE)

Intermediate Resonance (SAUS)

Intermediate Results (SAUO)

Intermediate Review (NATG)

Internal Range (SAUS)

Internal Reconstruction - Linguistics (IEL)

Internal Register (IAA)

Internal Reliability

Internal Repeat - Genetics

Internal Report

Internal Request (SAUS)

Internal Resistance

Internal Revenue

Internal Revenue Decisions - Department of the Treasury - A publication (DLA)

Internal Review - Army (AABC)

Internal Rotation - Myology

Internationale de la Resistance - Resistance International - RI (EAIO)

International Randonneurs - An association (EA)

International Rectifier Corp. (EFIS)

International Registration (BARN)

International Rendezvous (MCD)

International Representative (SAUS)

International Rice (IIA)

Internet Registry

Internetwork Router (SAUS)

Interpretation Report

Interpreter Releases (SAUS)

Interpreting Routine (SAUS)

Interpretive Routine (SAUS)

Interregio (SAUS)

InterRent - Car rental group

Interrogation Report

Interrupt Register (IAA)

Interrupt Request - Computer science (MHDB)

Interrupt Routine (SAUS)

Interval Rate - Army (AABC)

Intrarachidian (SAUS)

Invention Report

Inventory Record (SAUS)

Inventory Report (SAUS)

Inversion Recovery - NMR imaging

Inverted Repeat - Genetics

Investigation Record

Investigation Report (SAUS)

Investigation Request (SAUS)

Investment Recurring (MCD)

Investor Relations

Ionizing Radiation (SAUS)

Iran - ANSI two-letter standard code (CNC)

Iran - NCIC country-territory code (NCIC)

Iran Air - ICAO designator (AD)

Iran National Airlines - ICAO designator (AD)

Iran National Airlines Corp. (SAUO)

Ireland - IYRU nationality code (ROG)

Irish

Irish Law Reports - A publication (DLA)

Irish Rails (SAUO)

Irish Reports - A publication

Iron Roughneck (SAUS)

Irradiance - Electromagnetism (IAA)

Irregular - Telegraphy (PCTE)

Irrelevancy - Used in correcting manuscripts, etc.

Irrigated Rice Research Program (SAUO)

Isophthalic Resin - Plastics

Isoprene Rubber

Isotope Ratio (DB)

Isotope Reactor - Former USSR

Isotype Radiograph (SAUS)

Israel Railways (SAUO)

Item Record (AFIT)

Iterative Realization (SAUS)

Izquierda Republicana - Republican Left - Spain - Political party (PPE)

Rock Island Public Library, Rock Island, IL - Library symbol - Library of Congress (LCLS)

Immune-Response Genes - Immunology (QSUL)

Ingenieur - Engineer - French

Iran (MILB)

Iranian - Linguistics (IEL)

Iredell's North Carolina Equity Reports - A publication (DLA)

Iredell's North Carolina Law Reports - A publication (DLA)

Iridium - Chemical element

Irish (BEE)

Irnerius - Flourished, 1113-18 - Authority cited in pre-1607 legal work (DSA)

Immunoreactive - Medicine (EDAA)

Indent Right (WDMC)

Infrared (CARB)

Intrarectal - Medicine (DB)

Intrarenal - Medicine (DB)

Iran - MARC country of publication code - Library of Congress (LCCP)

Iron - CIPW classification - Geology