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  1. Internal Revenue Service | An official website of the United States ...

    Find IRS forms and answers to tax questions. We help you understand and meet your federal tax responsibilities.

  2. Infrared - Wikipedia

    Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the …

  3. Internal Revenue Service (IRS) | USAGov

    The Internal Revenue Service (IRS) administers and enforces U.S. federal tax laws.

  4. IR Definition & Meaning - Merriam-Webster

    The meaning of IR is iridium.

  5. IR - Definition by AcronymFinder

    What does IR stand for? IR abbreviation. Define IR at AcronymFinder.com.

  6. What does IR stand for? - Abbreviations.com

    Looking for the definition of IR? Find out what is the full meaning of IR on Abbreviations.com! 'Infrared' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and …

  7. IR - What does IR stand for? The Free Dictionary

    Looking for online definition of IR or what IR stands for? IR is listed in the World's most authoritative dictionary of abbreviations and acronyms.

  8. What does ir mean? - Definitions.net

    IR is an abbreviation for multiple concepts depending on the context. In terms of technology, it often stands for Infrared, referring to a type of light with a wavelength longer than that of red light and is …

  9. Infrared radiation - Energy Education

    Infrared radiation (IR) is a type of radiant energy, with longer wavelengths than the visible light humans can see, but shorter wavelengths than radio waves. Its range extends from fairly small wavelengths …

  10. IR - Wikipedia

    Ingenieur, abbreviated ir., an engineer's degree awarded by technical universities in the Netherlands, Belgium, Indonesia, and Malaysia Injured reserve list, a list of professional sports players who are …