Explaining the Peripheral Components of an IT System
Explaining the Peripheral Components of an IT System
Keyboard
The keyboard is used to input data into a computer by pressing the keys on it, the data maybe input into a verity of different applications from word processors to program generators. A keyboard has 102 keys on it as standard; these keys allow the inputting of numerical data, textual data and commands (By using the ‘F’ or function keys) into specially designed programs. The character keys are what are used to input textual data, this maybe into a word processor or Internet order form. The arrow keys are used to move selected items around, this can be useful in a word processor so that the user can put the cursor in the correct place before they start typing. The number pad is used for inputting numbers. In the case of a cash till system this would be used to key in card numbers or percentages for discounts. The function keys are used to make the execution of commands simpler. By assigning a certain key a property so that when it is pressed it brings up a menu it is possible to operate the whole system from these keys alone. The ESC or escape key is used to abort an instruction, this means if a user of a system accesses the wrong menu by hitting this key they will be able to leave this menu returning to the previous one. Some keyboards have extras on them like www, back, forward, stop, refresh and volume keys. The manufacturer adds these additional keys to make everyday tasks simpler like surfing the web or adjusting the master volume.
Display
The display of a computer system is essential for the user to be able to see the output from the system. The monitor gives a visual representation for the user of the task they are performing in real time. If a program requires inputs visual messages can be displayed on the screen that the user can read and respond to. Without a display it is almost impossible for a human to use a computer for any good use. Displays come on many different forms these all have their own benefits and drawbacks. The most common type of display is that of a desktop monitor. A desktop monitor will normally come...