Let's take a closer look. File extensions are things like .png or .mp4 at the end of a file name. The file extension is not ...

¹ refers to Version 7 and later OS/390 UNIX System Services Directory. ² refers to Version 7 and later OS/2 and Windows short filename extensions. For details about conditions under which short ...

New installations of Windows default to hiding the file extension when file names appear in Explorer windows and Open/Save dialog boxes in applications. However, this important element of the file ...