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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.

Apple has released several new and revised Developer Release Notes. We post two examples below. Because of our recent coverage of the file name extensions vs. Type/Creator controversy, we offer an ...