Calculator
A calculator was a tool that had the primary function of performing mathematics. 

Spock used a calculation device while making damage and repair estimates to the  in 2269. ()

In 2366, Gosheven chided Ard'rian McKenzie for her interest in Data, stating "only you would get this excited over a walking calculator." Her response was that she was fascinated by cybernetic intelligence. ()

See also 
 Calculating machine

External links 
 
 
Mathematics
Household tools