KnowraAbacusLinked fromLinked fromThe 20 pages that link to Abacus, each with the reason it gives.All 20Broader topic 1Related 8Narrower topic 4Compared with 7Mechanical calculatorNarrower topic: It is a major premechanical approach to representing and manipulating numbers.Computer (electronic device)Narrower topic: It illustrates calculation before machines automated arithmetic.History of computer scienceNarrower topic: Ancient counting tools show how practical calculation preceded formal computer science.History of computing hardwareNarrower topic: The abacus shows how physical objects supported systematic calculation long before machines.