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A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

Microsoft hides file extensions in Windows by default even though it's a security risk that is commonly abused by phishing emails and malware distributors to trick people into opening malicious files.

You can save any email as a PDF by printing it as such, but if you need to save emails to your hard drive quite often, this Chrome extension lets you PDF an email ...