Keyboard is the device that helps you to type on the monitor. The process of writing on the computer with the help of a keyboard is called typing. Keyboard has small buttons called keys. There are different types of keys on a standard keyboard like Alphabet key, Number Key, Function keys, etc… Each key has a different role on the keyboard. For example- The alphabet key is used to type English alphabets on the monitor, Number Keys are used to type numbers.
    There are lots of different styles of mouse, but most have a left and a right button. To hold your mouse, rest your hand over it and put your index finger on the left button and your thumb resting on the side. The cable needs to be pointing towards the computer. The mouse needs to always be in contact with a mouse mat, desk or hard surface.
You use your mouse to move the cursor around the screen. The cursor changes, depending on what you are doing on the computer. As an arrow you use it for moving and selecting things, as a hand for clicking on links when you are on the internet and it becomes an hourglass when you are waiting for the computer to do something.