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- 3. JOHN NAPIER -INVENTED THE “NAPIER BONES” A SET OF WOODEN RODS, ALLOWING USERS TO MULTIPLY AND DIVIDE LARGE NUMBERS AND FIND SQUARE AND CUBE ROOTS
- 5. WILHELM SHICKARD -INVENTS THE FIRST MECHANICAL CALCULATOR, IT CAN WORK WITH SIX DIGITS, AND CARRIES DIGITS ACROSS COLUMNS.
- 8. BLAISE PASCAL -INVENTED THE MECHANICAL CALCULATOR CALLED “PASCALINE” MADE UP OF CLOCK AND GEARS AND LEVERS, AND COULD SOLVE BASIC MATH PROBLEMS
- 11. GOTTFRIED LEIBNITZ -INVENTED A MACHINE CALLED “STEPPED RECKONER” THAT COULD MULTIPLY 5 DIGIT AND 12 DIGIT NUMBERS YIELDING UP TO 16 DIDGIT NUMBER