What is a file extension?
Every modern user should know thatsuch a file extension, otherwise it will simply not be able to access most files. An extension is a special combination of characters that is added after the point to the file name to identify its format. The user, having looked at the extension, can understand with the help of which program it is possible to open the file.
The most popular extensions thatmeet a typical user - this is .doc (text document), .jpeg (image), .mp3 (audio). Typically, files with these permissions are opened by standard Windows tools that are installed on the computer by default, but sometimes you have to work with less common files, for example .psd. This extension means that the file can be opened only if Adobe Photoshop is installed on the computer.