Did you know that the first time the word "Hello" appeared in a dictionary was 1883?

Before that, the first recorded usages are around 1826. But the word didn't really catch on for popular use until the invention of the telephone in the 1870s.

What did people say before that?
"Observe Everything. Always think for yourself. Never let other people make important decisions for you." — from Bad News by Edward St. Aubyn