Answer:

abaci

AnswerCrossword Clue
ABACIEarly counters
ABACIOriginal computers
ABACIComptometer precursors
ABACIYou can count on them
ABACIAncient calculators
ABACIEarly adders
ABACIOriental counting boards
ABACICalculators that don't need batteries
ABACICrude counters
ABACICalculators' ancestors
ABACIAdders with beads
ABACICounting frames
ABACIBeaded counters
ABACIBasic calculators
ABACIBeaded calculators
ABACISummers in the East?
ABACIAncient adders
ABACISummers of old?
ABACIBeaded adders?
ABACIAsian counters
ABACIBasic counters
ABACICounters with beads
ABACIEastern counters
ABACIPrimitive calculators
ABACIBead counters for bean counters
ABACICollectible calculators
ABACIEastern adders?
ABACISummers in China?
ABACISimple calculators
ABACICalculators with beads
ABACICounting devices
ABACIEarly calculators
ABACIEarly beadworks?
ABACISlide rule precursors
ABACIPrimitive adders
ABACIBead counters?
ABACICrude adders
ABACIOld adders
ABACIBeaded adders
ABACIAncient counting tools