(n.) One who computes or reckons: one who estimates or considers the force and effect of causes, with a view to form a correct estimate of the effects.

CA CPA Comptometer abacist abacus accountant accountant general actuary adding adding machine analog computer arithmograph arithmometer auditor bank accountant bank examiner bookkeeper calculating machine cash register certified public accountant chartered accountant clerk comptroller computation computer controller cost accountant cost keeper counter difference engine digital computer electronic computer estimator figurer intriguer journalizer listing machine machinator maneuverer manipulator pari-mutuel machine quipu reckoner recorder registrar rule schemer slide rule sliding scale statistician strategist suan pan tabulator tactician wire-puller