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Questions tagged [biquinary]

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14
votes
1answer
552 views

How does a biquinary adder work?

I whipped together a quick answer to this question and then realised, that I have no idea how these tubes manipulate the numbers. A binary adder is easy to understand to the modern mind; for each bit ...
42
votes
2answers
4k views

Why did the IBM 650 use bi-quinary?

The IBM 650, announced in 1953, was the world's first mass-produced computer. It represented numbers in decimal, which is understandable, both because it needed to work with exact money amounts, and ...