Definition of operators:
(n) :
A person or organisation that operates a device, system, service, etc.
(n) :
A telecommunications facilitator whose job is to connect or otherwise assist callers.
(n) :
(mathematics) A function or other mapping that carries values defined on a domain into another value or set of values in a defined range.
(n) :
(computing) A symbol that represents a construct in a programming language and differs from a normal function in its syntax.
(n) :
(informal) A person who is adept at making deals or getting results, especially one who uses questionable methods.
(n) :
(transport) A bus driver.