We are not talking about taxes here. File extensions are the three or four letters that appear after the “.” on files. .doc, .gif, and .pdf are a few examples of file extensions.
|So what are they, and how can I open them?|
|Generally, when you install a program like Microsoft Office or Adobe Photoshop, it will tell your operating system that it is the default program to open various file extension types. Sometimes, a file type is not registered with Windows or Apple. You can manually choose the program to use for specific file types.