From George Boole, founder of boolean algebra.
And, And not, Or
These are the 5 boolean operators are ( ) NEAR NOT AND OR
All Boolean operators are, are true or false statements.
Boolean is a type, not an operator and can have the value of either TRUE or FALSE
Telephone operators used to be called switch girls. That is probably not politically correct so "switch persons" would be the proper way to say it today.
Power Searching with Boolean