1) The world's largest particle accelerator, the Large Hadron Collider, is located near Geneva, Switzerland, and spans a circumference of 17 miles (27 kilometers).

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

3) The New York Stock Exchange (NYSE) is the largest stock exchange in the world.

4) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.