The low cost of digital representation of data in modern computer systems allows more elaborate character codes (such as Unicode) which represent most of the characters used in many written languages.
The numerical values that make up a character encoding are known as " code points" and collectively comprise a "code space", a " code page", or a " character map".Įarly character codes associated with the optical or electrical telegraph could only represent a subset of the characters used in written languages, sometimes restricted to upper case letters, numerals and some punctuation only.
Presence and absence of a hole represents 1 and 0, respectively for example, "W" is encoded as "1010111".Ĭharacter encoding is the process of assigning numbers to graphical characters, especially the written characters of human language, allowing them to be stored, transmitted, and transformed using digital computers.
Punched tape with the word "Wikipedia" encoded in ASCII.
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