(slang, computing) A rogue system administrator who abuses users of the system.

plural of bastard operator from hell

(historical) A Canadian democratic socialist political party active between 1932 and 1961 which served as the predecessor of the New Democratic Party.

(telecommunications) A provider of mobile telecommunications who does not operate any physical network infrastructure, but relies on contracting with physical mobile telecom network infrastructure operators to provide mobility access.

In an operant manner

The spiritual effect in the performance of a religious rite that is ascribed chiefly or exclusively to the disposition of the recipient.