EDIT ASCII The first 128 code points in Unicode are identical with ASCII (American Standard Code for Information Interchange), a standard from 1967. ASCII is a 7-bit code originally designed for paper tape, containing 33 control characters and 95 printing characters. It is adequate for writing basic English, Hawaiian, and Swahili, but hardly anything else. Some English words, such as résumé, are properly written using non-ASCII characters, but often written without them.

Code points U+0000-U+001F (0-31 decimal) and U+007F (127 decimal) are control characters.

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EDIT Control Characters Code points U+0000 to U+001F (0–31 decimal) and U+007F (127 decimal) are called control characters because they were originally used to control computer teletype equipment for which the ASCII standard was designed.

Teletype equipment has since become obsolete and the control characters are now used as delimiters in text files and as control characters for data terminals and terminal emulator programs.

On most keyboards, the characters 0–31 can be generated by holding down the Control key and pressing the key for the character 64 positions higher. For example, SOH can be generated by holding down Control and pressing A. This is often abbreviated as a caret and the character, e.g. ^A.

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