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The carriage return and line feed functions were split for practical reasons: Carriage return by itself provided the ability to overprint the line with new text. This could be used to produce bold or accented characters, underscores, struck-out text, and some composite symbols.
The Unicode special characters U+2424 (SYMBOL FOR NEWLINE, ), U+23CE (RETURN SYMBOL, ⏎), U+240D (SYMBOL FOR CARRIAGE RETURN, ␍) and U+240A (SYMBOL FOR LINE FEED, ␊) are glyphs intended for presenting a user-visible character to the reader of the document, and are thus not recognized themselves as a newline.
5 Carriage Return (accompanied by line feed) is used as "end of line" character by Windows, DOS, and most minicomputers other than Unix- / Linux-based systems 6 Control-O has been the "discard output" key. Output is not sent to the terminal, but discarded, until another Control-o is typed.
Apple Pro keyboard, showing symbols on the return key and, on the number pad, the enter key The return key symbol is U+23CE ⏎ RETURN SYMBOL , an arrow pointing down and leftward; however, rendering of the symbol varies greatly by typeface , with it appearing hollow in some or with an additional initial rightward bar in others.
Amongst other uses, is the ECMA-17 / ISO 2047 symbol for carriage return [15] U+2AAB: 10923: Larger than: Supplemental Mathematical Operators ⪫ : Amongst other uses, is the ECMA-17 / ISO 2047 symbol for the tab character [15] U+3037: 12343: Ideographic Telegraph Line Feed Separator Symbol: CJK Symbols and Punctuation 〷
U+000D CARRIAGE RETURN (CR) (used in some line-breaking conventions) U+0085 NEXT LINE (NEL) (sometimes used as a line break in text transcoded from EBCDIC) Unicode only specifies semantics for U+0009—U+000D, U+001C—U+001F, and U+0085 (the ASCII format effectors except for BS, plus the ASCII information separators and the C1 NEL).
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
The 1901 Murray code added the carriage return (CR) and line feed (LF), and other versions of the Baudot code included other control characters. The bell character (BEL), which rang a bell to alert operators, was also an early teletype control character. Some control characters have also been called "format effectors".