B efore we go on, let's be sure we can quit a program and close down the computer properly. When computers are not shut down in proper sequence, sometimes files get corrupted which can cause all kinds of trouble. Basically, you want to shut down your open program with the program's own Exit command . Then close down the computer with the appropriate steps, depending on your operating system. In a modern DOS program you would choose the Exit command , usually on the File menu.
Games often have graphical menus, rather than the menu bar across the top.
If the program doesn't display a menu, some combination of keys will be the Exit command. Again, different programs use different keys. You'll have to read the program directions to see what to use. Some old DOS programs assume that the program was being run from a floppy. These were written before the days of hard drives.