A thing that you move with your hand to control what a computer does.
A mouse.
What's this?
A printer
What's this?
At
What's this?
A charger
A piece of equipment used to take photographs.
A camera.
What's this?
A thumb / pendrive
An area on the Web where information about a particular subject, organization, etc. can be found.
A website
A small computer that you can carry around with you.
A laptop
A piece of electronic equipment.
A device
A piece of electronic equipment that you put in your ears so that you can listen to music, etc.
Earphones
What's this?
An envelope.
What's this?
A keyboard