What is a cov file and how do I open a cov file?
COV is a file created by Microsoft Fax Cover Page Editor, a fax program included with Windows Business, Ultimate, and Enterprise editions; saves the page layout structure, text, and graphics for a fax cover page; often contains company logos, the company name, and the sender's address; used for fax transmissions.
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How to open cov file on Wikipedia
How to open cov file on Microsoft.com