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Scrolling
up
Nowadays, a computer mouse has a wheel in between down

the right button and the left button. This is known as
the scroll wheel.

You need to place your index finger on the scroll wheel

and roll it upward or downward to move the page up or
down on the screen. This is called scrolling.

Keyboard

You use a pencil to write on a paper. In the same way, you need a keyboard to
type on a computer screen.

A keyboard has small buttons on it, called keys. You can type text on the

computer by pressing these keys.

Keys on the Keyboard

A standard keyboard consists of 101 to 104 keys. These keys are divided into

three categories:

Alphabet keys (A–Z or a–z)

Number keys (1, 2, 3, ..., 9 and 0 [zero])

Special keys (Enter key, Spacebar key, Backspace key, etc.)

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