Compare and contrast the radio and the mobile phone."

The following sentences are topic sentences for six paragraphs of this writing assignment:

The radios is also different because it is a 'one$-$way' system, which means that communication is only in one direction.

The final similarity is that both devices utilize free space as their physical channel.

Another feature that they have in common is that they both use wireless technology.

However, the first important difference betweenthem is that radion is an example of 'briadcast communication', where one transmitter ends data to many small receivers.

The radio and the mobile phone are both examples of telecommunication, so they share many characteristics.

One important similarity is that they both have the three basic elements of any telecommunication system, which are a transmitter, a medium, and a receiver.