Character Set - American Standard Code for Information Interchange (ASCII)

1 - About

ASCII is a character set originally based on the English alphabet, it encodes 128 specified characters into 7-bit binary integers.

It defines:

  • 95 printable characters, including the space (which is considered an invisible graphic),
  • 33 non-printing control characters - many of which are now obsolete.

Until December 2007, ASCII was the most common character encoding on the World Wide Web, but since that time it has been surpassed by UTF-8, which includes ASCII as a subset.

3 - Meaning

  • (1) The American Standard Code for Information Interchange, a 7-bit coded character set for information interchange. It is the U.S. national variant of ISO/IEC 646 and is formally the U.S. standard ANSI X3.4. It was proposed by ANSI in 1963 and finalized in 1968.
  • (2) The set of 128 Unicode characters from U+0000 to U+007F, including control codes as well as graphic characters.
  • (3) ASCII has been incorrectly used to refer to various 8-bit character encodings that include ASCII characters in the first 128 code points.

4 - Extended Characters

Extended character List for the ALT characters (Fn+Alt+code or alt+code)

5 - Documentation / Reference

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