Ir or ir may refer to:

  • the abbreviation (Ir.) for the title of Ingénieur (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
  • International Relations, in political science, the study of foreign affairs of and relations among states
  • Investor relations, a management responsibility in which companies disclose information for regulatory compliance and for bond/share-holders to make investment judgments
  • 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
  • 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
  • Imaginary Realities, a MUD community online magazine
  • International Rescue (disambiguation)
  • Interracial (disambiguation)
  • In mathematics, the set of real numbers is sometimes written on computers as "IR", the I standing as the R's double-bar.

Read more about IR:  Organizations, Science and Medicine, Finance, Computing, Popular Culture

Other articles related to "ir":

List Of Members Of The United States House Of Representatives Who Served A Single Term - 51st-60th Congresses (1889–1909) - 58th Congress (1903–1905)
... Brown IR-PA George W ... Porter IR-PA Ira Rider D-NY George Shiras III IR-PA Francis Emanuel Shober D-NY Joseph Shull D-PA George J ...
Loch An Iúir
... Loch an Iúir (Irish lake of the yew), anglicised as Loughanure, is a village in the north-west of County Donegal, Ireland ... its name to the native yew tree which grows wild on Oileán Iúir, a small island on the lake ...
LGBT History In Ireland - Post-independence
... of those within the acting profession such as Micheál MacLiammóir ... widely accepted that Micheál MacLiammóir was gay, and that his long time life partner was Hilton Edwards ... MacLíammóir would even appear on Irish TV in the fifties and sixties performing in drag ...
Types of Missile Approach Warning (MAW) Systems - Ultra Violet Based MWS
... therefore have a much reduced false alarm problem to solve compared to IR based systems ... Is a simpler system than Pulse Doppler IR technologies ... IR based systems probably better at altitude but UV better against surface to air missiles ...
LLM01 - Operation Modes
... The LLM01 offers the following "lighting and/or sighting" options White light flashlight, bright, 6 V, light comparable with a SureFire flashlight with 2 batteries Non eye-safe laser sight, the visibility depends on the environmental light conditions, suited for quick shots ... At dusk the red laser dot is visible just over 150 m Infrared (IR) laser, visible only when LUCIE (part of Germany's IdZ modernization program) or another infrared night vision device is used, unless the enemy has IR night vision equipment the IR laser will not reveal the presence of the LLM01 IR light beam Infrared target illuminator, the IR illuminator has a maximum range of up to 10 m Combinations of white light flashlight and laser red dot and IR laser and IR target illuminator, appropriate for simultaneous lighting and aim point determination ...