A contrivance for calculating (6)
I believe the answer is:
abacus
(Other definitions for abacus that I've seen before include "means of multiplying" , "Early counting-frame" , "that one can count on" , "Manual calculator" , "this adds up" .)
I believe the answer is:
abacus
(Other definitions for abacus that I've seen before include "means of multiplying" , "Early counting-frame" , "that one can count on" , "Manual calculator" , "this adds up" .)