What common, rudimentary tool requires constant, active manipulation and is classified as a counting frame rather than a true automated machine?

Answer

The abacus

The abacus is described as a counting frame that necessitates constant user manipulation for every arithmetic step, distinguishing it from automated machines.

What common, rudimentary tool requires constant, active manipulation and is classified as a counting frame rather than a true automated machine?

#Videos

Who Invented The First Mechanical Calculator? - Next LVL ...

inventionHistorydevicecalculatormanual