back up - prepare a second copy of a file, program etc that you can use if the main one fails, plug in - connect electrical equipment to the main supply of electricity, scan in - pass light over a picture or document using a scanner in order to copy it and put it in the memory of a computer, shut down - stop a machine working, turn down - reduce the noise produced by a piece of equipment by moving its controls, turn off - stop the flow of electricity by moving a switch, pressing a button, etc, turn on - start the flow of electricity by moving a switch, pressing a button etc, turn up - increase the sound of a piece of equipment, type in - use the keybord to put information into a computer, break down - stop working because of a fault , log off - perform the actions that allow you to finish using a computer system, log on - perform the actions that allow you to begin using a computer system,

solutions Elem 7E

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