1) The World Wide Web, developed by Tim Berners-Lee in 1989, revolutionized the way information is accessed and shared on the internet.

2) The concept of quantum computing explores the use of quantum mechanics principles to perform complex computations, potentially revolutionizing fields such as cryptography and optimization.

3) The English alphabet has five vowels: A, E, I, O, and U.

4) The word "banana" contains three vowels: A, A, and A.