A
B
C
1

a self-contained software package that allows users to perform specific tasks 

App(s)

1

A container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.

Battery 

1

a device for recording visual images

Camera

2

a flat panel or area on an electronic device such as a television, computer, or smartphone, on which images and data are displayed.

Screen, black and white screen, or color screen

2

a device for charging a battery or battery-powered equipment.

Charger 

2

a rod, wire, or other device used to transmit or receive signals

Antenna (external antenna)

3

It is a network of satellites and receiving devices used to determine the location of something on Earth

GPS

3

global network that connects devices and users

Internet

3

a body's relative mass or the quantity of matter contained by it

Weight, light weight, or heavy weight 

4

It is pressed to operate an electrical device.

Push button

4

It is any kind of electronic device designed to be worn on the user's body

Wearable device

4

technology used to connect computers, tablets, smartphones and other devices to the internet

Wi-fi