| A | B |
|---|
QWERTY Keyboard,  | Input Device-all purpose keyboard supplied with most computers |
Concept Keyboard,  | Input Device-special keyboard for special tasks. Often used in restaurants/pubs |
Touch Screen,  | Input Device-touch sensitive screen often used for public information systems |
Mouse,  | Input Device-the most common pointing device |
Tracker Ball,  | Input Device-alternative to a mouse |
| Touch Pad, | Input Device-alternative to a mouse on many laptops |
Joystick,  | Input Device-mainly used for games |
Graphics Tablet,  | Input Device-used for detailed drawing |
Scanner,  | Input Device-used to input printed images into a computer system |
Digital Camera,  | Input Device-takes photographs which can be downloaded to a computer |
Microphone,  | Input Device-used to input sound into a computer |
Sensors,  | Input Device-a device which measures physical quantity such as temperature |
Barcodes reader,  | Input Device-a device often seen in shops for inputting information from barcodes |
MICR,  | Input Device-reads magnetic ink such as that found on bank cheques |
Magnetic Stripe,  | Input Device-often found on bank cards |
Smart Cards,  | Input Device-a card such as a satellite receiver card |
OMR,  | Input Device-a device which reads marks on paper |
OCR,  | Input Device-an input device which reads text |
Monitors / VDUs,  | Output Device-Almost all computers have a monitor. Monitors are also known as Visual Display Units |
Dot Matrix Printers,  | Output Device-these printers are impact printers. They produce an image by hammering a column of Output Device9 or 24 pins against a ribbon |
Laser Printers,  | Output Device-produce very high quality |
Ink Jet Printers,  | Output Device-the most popular type of printer for use at home or in a small business. This is because they are relatively cheap to purchase and can print in colour |
Plotters,  | Output Device-can be used to produce very large drawings on paper sizes up to A0 (16 times as big as A4) |
Speakers,  | Output Device-Sound can be output through loudspeakers or headphones |
| Control Devices | Output Device-Computers can also be used to control other devices such as motors and lights which can be switched on and off. These devices are activated by electrical signals sent to them by a computer |
