e/Caret notation

Information
has gloss	eng: Caret notation is a notation for unprintable control characters in ASCII encoding. The notation consists of a caret (^) followed by a capital letter; this digraph stands for the ASCII code that has the numerical value equivalent to the letters numerical value. For example, ^D represents the end-of-transmission character (abbrevated EOT), which cannot ordinarily be shown on the screen. The letter is D, because it is the 4th letter in the alphabet and EOT has the value 4 in the ASCII encoding. The null character (NUL) is represented as ^@ (@ is the ASCII character before A). The DEL character with the value 127 is usually represented as ^?, because the ASCII ? is before @' and thus is control character -1, which is the same as 127 if masked to 7 bits.
lexicalization	eng: caret notation
instance of	(noun) an ordered list of characters that are used together in writing or printing character set