Synonyms: reckoner, ready reckoner
Definition: a handbook of tables used to facilitate computation
Similar words: vade mecum, handbook, enchiridion
Definition: a concise reference book providing specific information about a subject or location
Synonyms: calculator, computer, estimator, figurer, reckoner
Definition: an expert at calculation (or at operating calculating machines)
Similar words: expert
Definition: a person with special knowledge or ability who performs skillfully