Choosing Computer Accessories

4. Scanners

A scanner allows you to convert printed documents into digital form.

4.1 A scanner works like a photocopier, but scans are stored on a computer rather than being copied onto paper.

The most common type of scanner is a flatbed scanner.

• You can scan text, graphics and photographs.
• Some scanners can handle other media, like transparencies, slides and negatives
• Scanners allow you to archive printed documents like contracts and invoices. You can also digitise photographs for use online or in presentations or scan documents and send them by mail.
• Most scanners are compatible with PCs, Macs and most common operating systems. They generally use a standard USB cable to connect to your computer.

4.2 When choosing a scanner, consider how frequently you will be scanning documents.

• If you only plan to scan single page items infrequently, a basic flatbed scanner will suffice.
• If you will be scanning multi-page documents, look for a scanner with a document feeder. This allows you to load several pages at once.

4.3 The quality of scans is measured in dots per inch (dpi).

• Look for a scanner offering at least 1,200dpi.
• Manufacturers sometimes quote inflated dpi figures. The 'optical resolution' figure is the one that counts.