1) The concept of compound interest can be attributed to the ancient Babylonians, who used it in their banking practices.

2) The first commercially successful video game was "Pong," released in 1972 by Atari.

3) The world's first insurance policy was issued in 1347 in Genoa, Italy. It insured against the risk of maritime trade.

4) The European Union (EU) is a supranational organization comprising 27 member states that cooperate on various issues, including trade, economic integration, and common policies, while preserving individual national sovereignty.