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With more than 1,000,000 human-edited definitions, Acronym Finder is the world's largest and most comprehensive dictionary of acronyms, abbreviations, and initialisms. Combined with the Acronym Attic, Acronym Finder contains more than 5 million acronyms and abbreviations. You can also search for more than 850,000 US and Canadian postal codes.

An exponentially expanding dictionary consulted by bureaucrats, translators, doctors, weapons designers and anyone else who needs help decrypting the wide world's daily output of acronyms

Get an astounding array of explanations for things like HRT and NASP. And if you're really bored, make up an acronym and see what it means

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Information technology, Internet/Web, telecommunications, computing & computer science, hardware, software, etc. (over 86,000 definitions)
Examples: AJAX, CMM, DHCP, FTP, HTTP, PDA, RSS, SDK, TCP, WWW

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Local, national and international governments, military, defense, defense industry, weapons systems, etc. (over 154,000 definitions)
Examples: DoD, ICBM, ICE, NHS, MoD, NOAA, NSA, OSHA, NZQA

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Business, finance, accounting, marketing, real estate, shipping, companies, stock markets, products, etc. (over 76,000 definitions)
Examples: BOE, CEO, EBIDTA, FOB, GAAP, IKEA, IPO, MLS, P&L, TVM

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Popular science, hard science, medicine, nature, engineering, physics, space, astronomy, geology, chemistry, etc. (over 145,000 definitions)
Examples: ACL, DNA, HEPA, LASER, MRI, PTFE, SSRI, TIA, TENS, VOC

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Local, national, and international organizations, schools, colleges, universities, education, non-profits, NGOs, etc. (over 195,000 definitions)
Examples: ALA, ANWB, BBB, IEEE, MoMA, NEA, miaoss妙速加速器网址, UN, WTO

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Slang, chat, instant messaging, newsgroups, sports, people, pop culture, etc. (over 41,000 definitions)
Examples: AFAIK, BRB, IIRC, ssfree加速器, JFK, LOL, MVP, RBI, ROFL