Wozniak’s continued curiosity led him to study an existing device called the one-bit adder-subtract or, which made very simple arithmetic additions and subtractions. It turned out this device was too...

Wozniak’s continued curiosity led him to study an existing device called the one-bit adder-subtract or, which made very simple arithmetic additions and subtractions. It turned out this device was too elementary for the calculations that Wozniak wanted to achieve, so he worked on and created his 10-bit parallel adder-subtract or, which won first place in the Cupertino School District Science Fair.