1
valuable
having a great value in money; expensive
2
dictation
the speaking or reading of words for a person to write down or a machine to record
3
radar
the use of radio waves to track the location, distance, and speed of faraway objects
4
device
something used to do a simple task or something made (invention) for a specific purpose
5
technology
inventions and methods of solving problems that are made through research in these areas
6
breakthrough
an important discovery in an area which leads to better understanding