1) Insurance fraud occurs when individuals or organizations deliberately deceive insurance companies to receive undeserved benefits.

2) The word "computer" contains three vowels: O, U, and E.

3) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.

4) The Appalachian Mountains, running along the eastern coast of the United States, are one of the oldest mountain ranges in the world.