Random Crossword-Puzzle

Answer: SLIDERULES

Possible questions:


Early calculators we know 2 Answers
Engineers' gear, once we know 1 Answer
They took care of roots we know 1 Answer
Forerunners of pocket calculators we know 1 Answer
Calculator predecessors we know 1 Answer
"Feet first" and "No pushing"? we know 1 Answer

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