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Originally Posted by hunterman01
I thought binary numbers is what they used to "code" back in the day using 0 off and 1 as on and with those numbers there is ways you can get letters (learned that in java class a while back i learned how to use it but forgot a long ass time ago)
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Yeah, because processors are just thousands of transistors everything eventually gets converted to binary to be sent into the processor.
Back in the day they used to use binary punch cards to do some computing, but mainly data storage, however they could be used for maths aswell amongst other things.
Punched card - Wikipedia, the free encyclopedia
As for numbers, since the letter "Z" can be perfectly described by a byte, then you can describe it in binary in a relatively short form, 01011010, if you convert this to decimal then you get the number 90, which is the more standard way to describe the letter in number form.
But everything that you use on a computer is at one time or anouther running in binary so that the processor can interact with it.