L’Atanasoff-Berry Computer (spesso chiamato ABC) è stato il primo computer digitale totalmente elettronico; rappresenta uno dei maggiori passi avanti della storia dei calcolatori. La macchina tuttavia fu la prima a implementare tre idee fondamentali che fanno parte di ogni computer moderno: 1) L’utilizzo dei numeri binari per rappresentare i numeri e i dati – 2) Tutti i calcoli sono effettuati attraverso circuiti elettronici invece che con ingranaggi, parti meccaniche o interruttori elettromeccanici – 3) Il sistema è organizzato in due parti separate tra loro: una si occupa dell’elaborazione dei dati, l’altra della loro memorizzazione.
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