Welcome to the Voice of America's Newswords.
This week's Newsword is about something that has taken place during the Information Age.
Revolutionary.
Apple has been inventing digital products for 40 years.
Handheld devices were a huge success, but buttons were still hard to use.
So Apple's designers came up with a revolutionary touch technology, first introduced in iPod Touch.
Here, revolutionary means a discovery that causes a complete change in the way something is done.
It comes from the words revolt and revolution, which mean fighting for change.
Revolutionary ideas can be about political or social change.
