Classroom clickers of old
The crossword puzzle clue today is "Classroom clickers of old". To solve this puzzle clue, we look for the similarity crossword puzzle definitions for our clue. Below are the possibilities crossword solution and answer for "Classroom clickers of old".
Classroom clickers of old :
: a device used for counting and calculating by sliding small balls or beads along rods or in grooves
The abacus (plural “abaci”) was used as a counting frame long before man had invented a numbering system. It is a remarkable invention, particularly when one notes that abaci are still widely used today across Africa and Asia.
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