Keyboard
is
the primary input device. By using
Keyboard the user can interact with
the operating system and the other
application software of the computer.
Basically Key board is divided into
two main Categories.
· QWERT.
· DVORAK.
QWERT is the normal standard keyboard.
Which is similar to the Typewriter
keypad. However the DVORAK keyboard
is little change in the order of its
keys. Under the DVORAK keyboard the
most common keys are paced nearer
to each other. But both the keyboard
types are basically divided into four
parts according to its keys.
· Numeric Keys.
· Alpha Numeric Keys.
· Function Keys.
· Screen Navigation Keys.
Numeric keys:-
Numeric keys are used to enter the
numeric data into the computer. These
keys are normally use for mathematical
operations.
Alpha
Numeric Keys:-
Alpha Numeric keys include upon
Alphabets as well as the special
Symbols. Alphabets ranging from
A-Z and special symbols include
upon @, #, $, %, &, *, and etc.
Function Keys:-
Function keys are used to perform
the specific function. And function
keys started from F1 to F12. Function
keys are changed according to the
environment of the application.
But some keys are having uniqueness
and their work is same in different
applications. E.g. (F1) key. Whenever
the user presses F1 it gives him
a complete help about that topic.
Screen Navigation Keys:-
Screen navigation keys are used
to navigate with the screen. Following
are the main screen navigation keys.
Which are used for different purposes.
· Home
· End
· Insert
· Delete
· Page Up
· Page Down
· Control (Ctrl)
· Alternate (Alt)
· Escape (Esc)
The
most common key board are:-
101-key Enhanced keyboard
· 104-key Windows keyboard
· 82-key Apple standard keyboard
· 108-key Apple Extended
keyboard
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