Do you know these 50 famous acronyms?

(STACKER) - Humans have been using acronyms for centuries. One of the earliest examples can be seen in the Greek word "ichthys" which stands for "Iēsous Christos, Theou Yios, Sōtēr" (or "Jesus Christ, Son of God, Savior"). The word, meaning "fish" in Greek, is often used today to describe the Jesus fish symbol. Ancient governments used acronyms, too. The Roman Empire, for example, often referred to itself as SPQR ("Senatus Populusque Romanus").Today, acronyms are used fo