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Backing up

All of your applications and all of your documents are just little "bits" and "bytes" of electronic impulses stored on magnetic disks. As you can imagine, it's a little fragile. Hard disks go bad after three or four years (and sometimes earlier), and other disks can lose their data (their bits and bytes) fairly easily. If you're not careful, you can and will lose important documents and even software you paid for. For this reason, you always want to have a current backup, an extra copy, of anything that is important to you.

Note

One bit of information is one electronic pulse in the computer, one off or on signal, a 1 or a 0 (zero).

Eight bits of information makes one byte.



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