1) The oldest known musical instrument is a flute made from a bird bone, estimated to be around 43,000 years old.

2) The recent increase in cyber attacks, including ransomware attacks targeting critical infrastructure, businesses, and individuals, has highlighted the importance of cybersecurity measures and the need for enhanced protection against evolving threats.

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

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