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General Abbreviations and Acronyms Sites

Acronym Finder  
Searchable database contains over 87,000 acronyms/abbreviations and their meanings. Also allows "Reverse Lookup."  

The Opaui Guide to Lists of Acronyms, Abbreviations, and Initialisms on the World Wide Web
Provides links to subject-specific abbreviations from "accountancy" to "veterinary medicine."  

World Wide Web Acronym and Abbreviation Server  
Searchable list of almost 18,000 Internet acronyms and abbreviations.

Area Codes

AreaCode-Info.Com  
Provides links to area code lists and maps; covers both U.S. and other countries.   

LincMad Telephone Area Codes & Splits  
Contains information about the North American Numbering Plan (NANP) that includes the U.S., Canada, and some territories in the Caribbean. Also provides links to maps, International Country Codes, and other sites.   

World Telephone Numbering Guide  
Provides number information by country, telephone country code, regions (Europe, Caribbean), special services, and other useful information.

 

ZIP/Postal Codes and Abbreviations

Official Postal Service Abbreviations Lists abbreviations for (U.S.) States, military locations, street suffixes (alley, falls, avenue), and "secondary unit designators" (apartment, suite, floor).   

Universal Postal Union Click on Postal Administrations. Then click on Postal Addresses located in the column on the left side of the screen for explanations of addressing systems used in countries around the world.   

ZIP Code Lookup and Address Information Part of the U.S. Postal Service web page; allows searches for ZIP+4 codes for specific addresses, cities, states, and ZIP code associations.

More Options  
Additional print resources for Abbreviations, Acronyms, and (Area and ZIP/Postal) Codes.