1) The word "guitar" contains three vowels: U, A, and I.

2) Insurance premiums are the payments made by policyholders to insurance companies in exchange for coverage.

3) The shortest war in history lasted only 38 to 45 minutes between Britain and Zanzibar in 1896.

4) The Internet of Things (IoT) refers to the network of physical devices, vehicles, appliances, and other objects embedded with sensors, software, and connectivity.