Keyboard allows a user to type alphabet, numbers or symbols , small buttons called keys. 

Computer keyboard keys and their functions

Keyboard

It is the most commonly used input device. Keyboard allows a user to type alphabet, numbers or symbols , small buttons called keys. The keys are ASDEF , QWERTY etc pattern.

Keyboard can be divided into following sections.

Function Keys
Alphanumeric Keys
Numeric Keypad
Cursor control/Navigation Keys
Function Keys

Located at the top of the keyboard. Different  purpose of these keys is based on the software which we are using. Like.

F1 key  To open the Help screen in Windows.

 Alphanumeric Keys

These keys are the collection of letters, punctuation and numbers keys. It also includes special keys, the Tab, Caps Lock, Back Space, Enter, Shift Ctrl and Alt keys.

Numeric Keypad

Located on the right side of a keyboard. Digit keys and mathematical operator keys are here.

Cursor Control/Navigation Keys

 Cursor control keys consist of, Insert, Delete Home, End, Page Up, and Page down.

 Arrow keys

To move cursor.

Important Keys and their Functions

Tab

If you want to move the cursor more than one space,press Tab key.

Delete

To erase a letter or number.

Backspace key

To erase a letter or number to the left of cursor.

Esc

To terminate any process in between the cursor

Home key

Used to moves the cursor to the beginning of the line or screen

Caps Lock

 It is used when we want to write a capital letters.

Ctrl, Alt

 For example:

Ctrl +O = Open a new file

Alt F4 Close any program/window

 End key

End key moves the cursor to the end of the line or screen. End All Enter key is used.

Shift keys

To type capital letters

To type symbols

Enter Key

 To start a new line To execute a command