1) The word "guitar" contains three vowels: U, A, and I.

2) The term "cloud computing" refers to the delivery of computing services, including storage, databases, and software, over the internet rather than on a local server.

3) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.

4) The Arctic Ocean is the smallest and shallowest ocean, located at the North Pole. It is covered by sea ice for much of the year.