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19 Cards in this Set

  • Front
  • Back
Alphanumeric Keyboard
A very common, general purpose, input device that allows text (abc…), numbers (123…) and symbols (%$@...) to be entered into a computer.

A keyboard is simply a set of buttons. Each button has a symbol assigned.
Numeric Keypad
A small keyboard that only has numbers.

Used to enter numeric data into computers such as those in ATMs.
PIN Pad
This is a device with a numeric keypad used to enter a person’s Personal Identity Number.
Pointing Devices
These devices are used to move an on-screen pointer or cursor (usually an arrow). They are commonly used with graphical user interfaces (GUIs)
Mouse
A pointing device found on most PCs. Sensors on the bottom of the mouse detect when the mouse is moved. Data about this movement is sent to the computer.

Often used to control the pointer in a GUI.
Joystick / Joypad
Used mainly for playing games. The user moves the joystick left/right, forward/back and data about these movements are sent to the computer.
Touch Screen
A touch screen is an alternative to a separate pointing device. With a touch screen the user selects items on the screen by touching the surface. This makes touch screen systems very intuitive and simple to use.
Scanner
A device that ‘scans’ images, book pages, etc.
Magnetic Strip Reader
Many plastic cards, such as credit cards, have a strip of material that can be magnetised on the back. Data can be stored here in the form of magnetised dots.

Usually the data stored on this strip in the same data shown on the front of the card.
MICR Reader
A technology that allows details from bank cheques to be read into a computer quickly and accurately.
OMR Scanner
A technology that allows the data from a multiple-choice type form to be read quickly and accurately into a computer.
OCR Scanner
A software technology that can convert images of text into an actual text file that can then be edited.
Sensors
A sensor measures a specific property data and sends a signal to the computer. Usually this is an analogue signal so it needs to be converted into digital data for the computer to process. This is done using by an Analogue-to-Digital Converter (ADC).
CRT Monitor
A monitor displays text and image data passed to it by the computer.
Loudspeaker
They convert electrical signals into sound waves.
Dot Matrix Printer
A dot-matrix printer is named after the pattern (a grid or ‘matrix’) of dots used when creating the paper printout. Dot-matrix print quality is poor, the printers are noisy.
Laser Printer
The laser printer uses a complex system, involving a laser, to make the toner stick to the required parts of the paper. The laser and toner system allows very fast printing compared to other printers.
Plotter
Plotters create hard-copy in a very different way to printers. Instead of building up text and images from tiny dots, plotters draw on the paper using a pen.
Control Actuators
An actuator is a device, controlled by a computer, that can affect the real-world.