Crossword puzzle clue "primitive calculator"

Here are the possible solutions for primitive calculator clue

Answer
Clue
Relevancy
abacus
Clue
Primitive calculator
Primitive counting device
Definition
(Latin) a counting frame using beads
psat
Clue
It has "calculator" and "no-calculator" math sects.
sliderule
Clue
Pre-calculator calculator
abaci
Clue
Primitive calculators
Primitive counters
Primitive computers
Primitive adders
Definition
ABACUS, (Latin) a counting frame using beads

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