... can be pre-programmed by the user. Scanners are used to copy pictures, text and documents and turn them into digital images for use on a computer. The speed , resolution, data transfer rate and connector interface are essential features of a scanner. The printer required for a system depends on what it is to be used for. The three most popular printers in use are inkjets, lazes and plotters. Inkjet printers wok by firing ink though tiny holes onto paper. Whilst the best versions can print near photo quality resolutions on special paper they generally slow and for home o small business use. Lazer printers are designed for high output, fast printing. Flatbed plotters are used for printing large technical images such as CAD, architectural or engineering diagrams. They use automated arms containing ink that draws on a page which is laid out flat. Removable storage devices allow you to add new information to your computer ...

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