This can be used for making phone calls, sending text messages, picture messages and video phone calls.

This can be used for making phone calls and sending text messages.(and for playing Snake!)

This can be used for making phone calls.

These can be used to send visual messages ie between two ships in a fleet at sea.

This can be used to send vocal messages. Ie between 2 rooms in a house.

These can be used to send messages between 2 people who are hard of hearing.

This can be used to send morse code messages over radio signals, it was a vital piece of communication equipment in WW2.

This can be used to send morse code messages in the dark.

These were used to write letters to send via post, which can take several days.

This can be used to type emails which can be sent over the internet. They will take a couple of minutes to be received.