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

2) The concept of virtual reality (VR) involves creating a simulated environment that can be explored and interacted with using specialized headsets and input devices.

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

4) The world's largest ocean, the Pacific Ocean, covers an area of approximately 63 million square miles.