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We are the world's largest and most comprehensive directory and search engine for acronyms, abbreviations and initialisms on the Internet. Abbreviations.com holds hundreds of thousands of entries organized by a large variety of categories from computing and the Web to governmental, medicine and business and it is maintained and expanded by a large community of passionate editors.

Academic & Science

Amateur Radio, Architecture, Biology, Chemistry, Degrees, Electronics, Geology, IEEE, Mathematics, Mechanics, Meteorology, Ocean Science, Physics, Universities»

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Accounting, Firms, International Business, Mortgage, NASDAQ Symbols, NYSE Symbols, Occupations & Positions, Professional Organizations, Stock Exchange, Tax»

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Internet

ASCII, Blogs, Chat, Domain Names, Emoticons, HTTP, MIME, Twitter, Wannas, Websites»

Miscellaneous

Chess, Clothes, Coins, Construction, Days, Farming, Food, Funnies, Gaming, Hobbies, Months, Photography, Plastics, Sci-Fi, Unit Measures, Journal Abbreviations»

Regional

Airport Codes, African, Alaska, Australian, Canadian, Cities, Countries, Currencies, European, Language Codes, Railroads, Tel. Country Codes, Time Zones, US States»

Medical

British Medicine, Dental, Drugs, Hospitals, Human Genome, Laboratory, Medical Physics, Neurology, Nursing, Oncology, Physiology, Prescription, Veterinary»

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    PPHI
    Peoples Primary Healthcare Initiative
    PPHI
    Provincial Personal Health Identifier
    PPHI
    Pharmacists Public Health Initiatives
    PSJ
    Planet Sci J
    PPHI
    Paul Peck Humanities Institute

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    PHP
    A Personal Home Page
    B Personal Humidity Provider
    C Private Home Property
    D Public Help Page

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