input output

magnetic stripe reader

device used to read the — of a card, which contains data

RFID

uses radio waves to identify and track special tags attached to objects

OCR

recognises typewritten or printed document and tanslates the images of the characters into digital text

OMR

recognising marks to select options to be captured for processing by a computer

CRT monitor ‘cathode ray tube’

allow users to instantly see outputs from the computer, also used with light pens to allow drawings to be created on screen

TFT/LCD monitor (‘thin film resistor’)

these are thin flat screened, monitors that are commonly seen today. They are used as screens in laptops and mobile phones

IPS/LCD monitor (liquid crystal display)

used for modern monitors and television sets. These are simply a development of the TFT monitors.

multimedia projector

Can be used for training presentations to allow the whole audience to see images from a single computer

laser printer

These produce high quality hard copy, use toner pressed on a page to produce printed documents. They can print large amounts of pages at a very quick rate.

inkjet printer

These are used to produce high quality hard copies. Although the quality of printouts is not as good as laser printers, it is far better than Dot Matrix printers

dot matrix printer

very robust and can be used in noisy and dirty environments. Can make ‘carbon copies’ of document using special ‘carbon paper’ underneath nomal printer paper.

wide format printer

They are able to produce large scale projects which save time and money. They are often used for posters and banners.

actuator

a device that causes another machine or device to operate

differences and similarities between RFID and magnetic stripe

Data cannot be read by eye so more secure, Data can be re-written, RFID is contactless therefore has less wear and tear whereas magnetic is placed in reader RFID reads the data faster More data on RFID card