A quantum bit, otherwise known as a qubit, is the basic unit of data in quantum computing. Like a binary bit in classical computers, as it can store information, but behaves very differently ...

The 1620 used binary-coded-decimal as you mention, not the 1401’s bi-quinary, so it’s not “the same scheme”, although it did also calculate on one decimal digit at a time.

Mathematicians say computers based on 1's and O's will give way to molecular systems that can simultaneously process arrays of data. Quantum information systems can tackle problems that today take ...