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WinFax ( also known as WinFax PRO ) is a Microsoft Windows - based software product designed to let computers equipped with fax - modems to communicate directly to stand-alone fax machines , or other similarly equipped computers .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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