Counting Invention Before the Calculator

This page is the CodyCross answer for the clue below from Larger than Life, Group 2146, Puzzle 1 (Billboard Signs).

Question is: Counting Invention Before the Calculator

and the answer is: ABACUS

Word Meaning:

ABACUS — (historical, obsolete) A table or tray scattered with sand which was used for calculating or drawing.

Definitions from Wiktionary.

Counting Invention Before The Calculator - Larger than Life CodyCross Answers | CodyCross Solutions