Control characters

blank area that separates words, sentences, syllables, or other written or printed glyphs; precise typographical rules differ according to language and context

space character that prevents an automatic line break at its position

thumb|A backspace key Backspace (, ) is the keyboard key that in typewriters originally pushed the carriage one position backwards. In modern computer systems, it typically moves the display cursor one position backwards, deletes the character at that position, and shifts back any text after that position by one character.

control character, or mechanism, used to reset a device's position to the beginning of a line of text

code point in a character set, that does not represent a written symbol

thumb|A newline inserted between the words "Hello" and "world" A newline (frequently called line ending, end of line (EOL), next line (NEL) or line break) is a control character or sequence of control characters in character encoding specifications such as ASCII, EBCDIC, Unicode, etc. A newline is used to signify the end of a line of text and the start of a new one.

character which invokes an alternative interpretation on subsequent characters in a character sequence

zero-width space (U+200B), commonly abbreviated “ZWSP”, intended for invisible word separation and for line break control; it has no width, but its presence between two characters does not prevent increased letter spacing in justification

control character whose bits are all 0

zero-width joiner (U+200D), commonly abbreviated “ZWJ”: non-printing format control used for the conjoined composition of character sequences needed in some complex scripts and emojis

zero-width non-joiner (U+200C), commonly abbreviated “ZWNJ”: non-printing format control character used to prevent joining adjacent characters, to render them with visually separated forms, without ligature between them

special sequence of computer characters with meaning other than the literal characters it contains

soft hyphen (U+00AD): format control character normally invisible, which indicates a break position within a word; if the word break is applied, the character is displayed as a hyphen at end of line before the break

C0 control character with value 0x07; typically causes a device to emit a sound

computing signal confirming receipt of a message

ASCII character number 127

bidirectional control character (U+200F); commonly abbreviated RLM

bidirectional control character

notation for C0 control characters; consists of a caret (^) followed by a capital letter; e.g. 0x04 is represented by ^D, while 0x00 is ^@ (@ is the ASCII character before A)

ASCII control characters

word joiner (U+2060), commonly abbreviated “WJ”: joining control character, similar to the non-breaking space

control character used in the place of a character that is recognized to be invalid or erroneous, or that cannot be represented on a given device; 0x1A in ASCII, U+001A in Unicode

C0 control character

control character indicating the end of a page, considered as one of the 'blank characters' in a character set

Unicode control character; name is misnomer; has 2 functions: ① indicates that a pair of characters is a digraph for the purposes of ligation but not for collation; ② prevents canonical reordering of combining marks for e.g. Hebrew cantillation marks

control characters in Unicode, ranging from U+0000 to U+001F and U+007F (C0), and from U+0080 to U+009F (C1)