angler - a scheming person; someone who schemes to gain an advantage

contriver, deviser, planner - a person who makes plans

politician - a schemer who tries to gain advantage in an organization in sly or underhanded ways

clerk - an employee who performs clerical work (e.g., keeps records or accounts)

confederacy, conspiracy - a group of conspirators banded together to achieve some harmful or illegal purpose

criminal, crook, felon, malefactor, outlaw - someone who has committed (or been legally convicted of) a crime

Fawkes, Guy Fawkes - English conspirator who was executed for his role in a plot to blow up James I and the Houses of Parliament (1570-1606)

Oates, Titus Oates - English conspirator who claimed that there was a Jesuit plot to assassinate Charles II (1649-1705)

computer, computing device, computing machine, data processor, electronic computer, information processing system - a machine for performing calculations automatically

instrument - a device that requires skill for proper use