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ASCII was a 7-bits American Standard Code for Information Interchange. Bit-0 was sometimes used. Now it consists of 8 bits.
The linked table  may differ depending on your OS/browser


When we were feeling the need to communicate with others we had not enough on 8 bits. An example:

An example of a 6-bit character set with several meanings are the hexagrams of the ancient Chinese I Ching

The 64 I Ching hexagrams