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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.

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MEAN
MongoDB, Express, AngularJs, and Node
AANE
Add A New Entry
WDUM
What Do You Mean?
ODR
On-Demand Routing
ERS
Electronic Reservation Slip