operator
noun
(mathematics) a symbol or function representing a mathematical operation
an agent that operates some apparatus or machine
“the operator of the switchboard”
Synonymsmanipulatorsomeone who owns or operates a business
“who is the operator of this franchise?”
a shrewd or unscrupulous person who knows how to circumvent difficulties
a speculator who trades aggressively on stock or commodity markets
Source: WordNet 3.1, Princeton University
