Crossword puzzle clue "battery free calculators"

Here are the possible solutions for battery free calculators clue

Answer
Clue
Relevancy
abaci
Clue
Battery-free calculators
Early calculators
Ancient calculators
Precalculator calculators
Beaded calculators
Primitive calculators
Old calculators
Definition
ABACUS, (Latin) a counting frame using beads
nose
Clue
Battery-free smoke detector?
Definition
to sniff with a smelling organ

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