LOCAL AREA NETWORKS ( LAN )Computers are connected together on one site using a cable such as ethernet The File server stores all programs and data. Relative Advantages of a LAN compared to stand alon

BAR-CODESBar codes are a series of parallel black and white lines used on food and other products such as books. The black and white lines represent numbers. A bar-code reader ( scanner ) is used to i

SENSORS   A sensor measures a physical variable such as heat or moisture.The value of the variable is then input into a CPU ( Central Processing Unit ) DATA LOGGING   Sensors mon

Zip Drive       - can have 100MB or 250MB of storage space            - they have the capacity of 72 floppy disks   &nb

There are two types of memory:1. Random Access Memory ( RAM )This stores tempory files and is where software is placed when it is loaded. A part of the RAM is allocated for the 'clipboard'. This is t

Hardware and peripherals are basically computer devices which add additional functionality to a PC.A Computer System is made up of a number of types of device. Computer devices are sometimes called P