Input and Output Devices

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
(i) devices are equipment that are used to put data into a computer.
  (ii) is the first stage of getting the data into the computer. The two main data input means are and data input (or data capture).
 (iii)Data is checking for accurate transcription, whilst data is the computer checking to see that the entered data obeys the rules already set up within the computer.
 (iv)The most common input device is the , of which there are two types: alphanumeric and special-function boards.
 (v) devices are used to move a pointer or cursor on the computer screen, and enable the control and selection of objects on the display. common pointing devices include the , digitising tablet, touch-sensitive screen, and light pen.
 (vi) devices use laser beams and reflected light to interpret and convert images, pictures and text into digital form.
 (vii)Magnetic Ink Character Recognition (MICR) is used mainly to read cheques, whose data is encoded with ink.
 (viii) detect the position of black marks on white paper. They are used mainly in multiple-choice exam marking, and assessing market research questionnaires.
 (ix) senses the patterns of reflected light off scanned text via a photo-electric device and compares it to the patterns in memory. The text is converted and stored in the computer, and can be manipulated by the user, e.g. in a word processing program.
(x) A is a set of vertical lines of differing thickness with a string of numbers printed at the bottom; it holds information about a product or item.
(xii) (RFID) is the use of embedded chips and radio waves to identify individual unique examples of animals, persons and objects.
(xiii) systems recognise certain patterns of speech and accept it for processing by the computer.
(xiv) input devices capture images and store them in memory.
(xv) refers to the science of identifying an individual through their body characteristics such as face geometry, fingerprint, hand geometry, iris, retina, vein and voice patterns.