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Collins Dictionaries

Collins Pro dictionaries from HarperCollins are feature-rich resources. They are exhaustive databases, including slang, technical language, and both UK and US spellings. The Pro-level dictionary software, developed and distributed by Ultralingua, represents the cutting edge in dictionary data and software.

English DictionaryCollins Pro English Dictionary

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Ultralingua Dictionaries

For over a decade, Ultralingua has been a market leader in language software for educators, translators, and travelers worldwide. Our products include dictionaries, grammar and spelling checkers, and semantic search technology.

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