IR

Look up ir in Wiktionary, the free dictionary.

Ir or ir may refer to:

• Ir. (Ingénieur), abbreviation for the title of Engineer, a person practicing the profession of engineering
• Iridium (chemical symbol Ir), the 77th element
• .ir, the Internet country code top-level domain for Iran

IR may refer to:

• Iran, which has the country code IR

Organizations

• Illinois Railway
• Indian Railways, the state-owned railway company of India
• Industrial relations (labor relations)
• Ingersoll Rand (NYSE trading symbol IR)
• Integrated Resort, a euphemism for a casino in Singapore
• Internal Revenue Service, the United States government agency that collects taxes and enforces the internal revenue laws
• International Rectifier, a manufacturer of power semiconductors
• International Rescue Corps, an organisation inspired by the Thunderbirds TV series
• Investor relations, a management responsibility in which companies disclose information for regulatory compliance and for bond/share-holders to make investment judgments
• Iran Air (IATA airline code IR)
• Iarnród Éireann (Irish Rail), the national passenger and freight railway system of the Republic of Ireland

Science and medicine

• Incident report
• Infrared, a portion of the electromagnetic radiation spectrum
• Insulin resistance
• Inverted repeat, a sequence of nucleotides that is the reversed complement of another sequence further downstream
• Interventional radiology
• Ionizing radiation
• Insulin receptor
• Immediate release (as opposed to sustained release) tablets

Computing

• Adobe ImageReady, a bitmap graphics editor shipped with Adobe Photoshop by Adobe Systems
• Information retrieval, the science of searching for information in or as documents or databases
• Information revolution, one of the theoretical frameworks within which trends in current society can be conceptualized
• Institutional repository, a digital collection for preserving the intellectual output of an institution
• Institutional research, the collection, analysis, and reporting of institutional data
• Instruction register, part of a CPU's control unit
• Intermediate representation, a computer data structure

Popular culture

• I.R. Baboon from the cartoon series I Am Weasel
• In Rainbows, the seventh studio album by the alternative rock band Radiohead

Other

• Injured reserve list, a reserve list for professional teams to use if a player is injured and unable to play for an extended time
• International rules football a hybrid code of football
• Independent-Republican Party of Minnesota, currently known as Republican Party of Minnesota
• International relations, in political science, the study of foreign affairs of and relations among states
• Instrument rating, the qualifications a pilot must have in order to fly under Instrument Flight Rules (IFR)
• Impulse response, is a function of a dynamic system of its output when presented with a brief input signal
• International Rescue (disambiguation)
• Interracial (disambiguation)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.