Ancient Predecessor to the Calculator
This page is the CodyCross answer for the clue below from Professions, Group 1540, Puzzle 3 (School Teacher).
Question is: Ancient Predecessor to 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.