I. INPUT DEVICES

1. Keyboard
Your Windows keyboard comprises of various keys sets. Sets as we say are a group of keys assigned a particular
function. Broadly the key sets are as follows:
The image shown here is a standard “QWERTY” style keyboard, used by over 80% of English using Computer
users. “QWERTY” is derived from the first six letters of the first lines of the alphabet set as shown here. Alphabet
Keys Set: This set comprises of alphabet keys arranged on the layout of a traditional typewriter as shown in the
image, and is used to print the alphabet pressed, on the screen. Combined with Shift key these keys change the case of
alphabet pressed. By default the keys use “lower case”. On pressing the Shift Key they Change to “Upper Case’
Number Keys Set Available in 02 sets these, one of the sets print numbers on the screen, Combined with Shift, it
prints the special characters as marked on it. The other set is combined with “Navigation keys” functions. By default
the “Navigation Keys” is activated. To activate the number keys on this set, one must press num lock, as this.
Navigation Keys Set: These keys help in moving the mouse cursor/pointer on the screen in the direction in which
the arrow points. This set is also used widely in computer games.
Function Keys Set: This set comprises of all keys numbered with F1 to F12, All keys have special function as
determined by the operating software. For example F1 for Help
Special Functions Set: This set comprises of Special Keys which have a preset function as understood by the computer program.