A second, safe copy of a file, letter or data. You should always do regular backups of your important work in case something goes wrong and you erase it. It might seem boring at the time, but it's far more boring to type all the information back in again. Normally you back up data on a little cassette tape or, if you don't have too much, on to floppy disks. Windows has a utility that makes backing up easy. You tell it which folder, directory or file you want to copy and whether you want to make a backup to a floppy disk or tape. Once you have made a backup, keep it well away from your main computer. If there's a fire then your PC and the backup could be destroyed.
