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One byte is usually 8 bits, but some computer systems used a 9-bit byte. A bit is a Binary digit. (0 or 1)

And a nibble is a 4-bit byte. Sometimes used in simple machines such as washing machine or toaster.

Back in early telegraphy days, paper tape was used for machine telegraphy. Its data was represented by 5 holes that could be punched across the width of a paper tape. Thus one could have 25 (= 32) characters.

This became supplanted by paper tape with 8 possible holes in a row. Thus 28 different characters could be represented. (256 characters).

A version of this was called ASCII code, American Standard Code for Information Interchange. And the electro-mechanical Teletype was the apparatus commonly used. This was in the (relatively recent) days before alpha-numeric symbols on an CRT screen.

Anyway, hence the 8-bit Byte.

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12y ago

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