A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

We have posted the second installment of Ted Landau's guide to Inivisble Files in Mac OS X. An excerpt: "The most common methods that OS X uses to determine if a file or folder should be invisible of ...

When you double-click on a file in Windows XP, the operating system will automatically open the file using a program that has been is associated with the file's extension. It is possible, though, to ...