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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 …

  3. Infrared radiation | Definition, Wavelengths, & Facts | Britannica

    Dec 18, 2025 · Infrared radiation, that portion of the electromagnetic spectrum that extends from the long wavelength, or red, end of the visible-light range to the microwave range. Invisible to …

  4. Delta Air Lines, Inc. - Home

    2 days ago · Corporate Profile Through exceptional service and the power of innovation, Delta Air Lines (NYSE: DAL) never stops looking for ways to make every trip feel tailored to every …

  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 …

  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. Infrared price today, IR to USD live price, marketcap and chart ...

    The live Infrared price today is $0.08318 USD with a 24-hour trading volume of $447,895,670.47 USD. We update our IR to USD price in real-time.

  9. Newsroom | Internal Revenue Service

    Get the latest news from the IRS, including how we're working to serve you better. Get IRS tax news and sign up for e-News updates. Find information on Form 1040, tax relief, regulations, …

  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 …