System files

These files are used by the OS of your computer. They are mostly created by the OS and the manufacturers of programs you have installed, but you can create them, too. For example – files with extension .exe are used to introduce the other files. We can see this chaining as a running program. If we double click (open) the program, it “calls” the other files containing the program code, graphics and the program is ready to use. Files with extension .bat represent the batch file. It’s a text file containing a row of commands for the OS Windows. Similar to the .bat files are files with extension .sys. These files are usually used as a device driver, but there are special files (MSDOS.SYS, CONFIG.SYS), which are used as the OS core files. We can create a .bat file by using a command line and .exe files by using some special programs.