Template:Char-ref

Binary	Oct	Dec	Hex	Abbr	<ref group="lower-alpha">The Unicode characters from the area U+2400 to U+2421 reserved for representing control characters when it is necessary to print or display them rather than have them perform their intended function. Some browsers may not display these properly.</ref>	<ref group="lower-alpha">Caret notation often used to represent control characters on a terminal. On most text terminals, holding down the Template:Keypress key while typing the second character will type the control character. Sometimes the shift key is not needed, for instance ^@ may be typable with just Ctrl and 2.</ref>	<ref group="lower-alpha">Character Escape Codes in C programming language and many other languages influenced by it, such as Java and Perl (though not all implementations necessarily support all escape codes).</ref>	Name
000 0000	000	0	00	NUL	␀	^@	\0	Null character
000 0001	001	1	01	SOH	␁	^A		Start of Header
000 0010	002	2	02	STX	␂	^B		Start of Text
000 0011	003	3	03	ETX	␃	^C		End of Text
000 0100	004	4	04	EOT	␄	^D		End of Transmission
000 0101	005	5	05	ENQ	␅	^E		Enquiry
000 0110	006	6	06	ACK	␆	^F		Acknowledgment
000 0111	007	7	07	BEL	␇	^G	\a	Bell
000 1000	010	8	08	BS	␈	^H	\b	Backspace<ref group="lower-alpha">The Backspace character can also be entered by pressing the Template:Keypress key on some systems.</ref><ref group="lower-alpha" name="bsp del mismatch"/>
000 1001	011	9	09	HT	␉	^I	\t	Horizontal Tab<ref group="lower-alpha">The Tab character can also be entered by pressing the Template:Keypress key on most systems.</ref>
000 1010	012	10	0A	LF	␊	^J	\n	Line feed
000 1011	013	11	0B	VT	␋	^K	\v	Vertical Tab
000 1100	014	12	0C	FF	␌	^L	\f	Form feed
000 1101	015	13	0D	CR	␍	^M	\r	Carriage return<ref group="lower-alpha">The Carriage Return character can also be entered by pressing the Template:Keypress or Template:Keypress key on most systems.</ref>
000 1110	016	14	0E	SO	␎	^N		Shift Out
000 1111	017	15	0F	SI	␏	^O		Shift In
001 0000	020	16	10	DLE	␐	^P		Data Link Escape
001 0001	021	17	11	DC1	␑	^Q		Device Control 1 (oft. XON)
001 0010	022	18	12	DC2	␒	^R		Device Control 2
001 0011	023	19	13	DC3	␓	^S		Device Control 3 (oft. XOFF)
001 0100	024	20	14	DC4	␔	^T		Device Control 4
001 0101	025	21	15	NAK	␕	^U		Negative Acknowledgement
001 0110	026	22	16	SYN	␖	^V		Synchronous idle
001 0111	027	23	17	ETB	␗	^W		End of Transmission Block
001 1000	030	24	18	CAN	␘	^X		Cancel
001 1001	031	25	19	EM	␙	^Y		End of Medium
001 1010	032	26	1A	SUB	␚	^Z		Substitute
001 1011	033	27	1B	ESC	␛	^[	\e<ref group="lower-alpha">The '\e' escape sequence is not part of ISO C and many other language specifications. However, it is understood by several compilers.</ref>	Escape<ref group="lower-alpha">The Escape character can also be entered by pressing the Template:Keypress key on some systems.</ref>
001 1100	034	28	1C	FS	␜	^\		File Separator
001 1101	035	29	1D	GS	␝	^]		Group Separator
001 1110	036	30	1E	RS	␞	^^<ref group="lower-alpha">^^ means Template:Keypress (pressing the "Ctrl" and caret keys).</ref>		Record Separator
001 1111	037	31	1F	US	␟	^_		Unit Separator
111 1111	177	127	7F	DEL	␡	^?		Delete<ref group="lower-alpha">The Delete character can sometimes be entered by pressing the Template:Keypress key on some systems.</ref><ref group="lower-alpha" name="bsp del mismatch">The ambiguity of Backspace is due to early terminals designed assuming the main use of the keyboard would be to manually punch paper tape while not connected to a computer. To delete the previous character, one had to back up the paper tape punch, which for mechanical and simplicity reasons was a button on the punch itself and not the keyboard, then type the rubout character. They therefore placed a key producing rubout at the location used on typewriters for backspace. When systems used these terminals and provided command-line editing, they had to use the "rubout" code to perform a backspace, and often did not interpret the backspace character (they might echo "^H" for backspace). Other terminals not designed for paper tape made the key at this location produce Backspace, and systems designed for these used that character to back up. Since the delete code often produced a backspace effect, this also forced terminal manufacturers to make any Template:Keypress key produce something other than the Delete character.</ref>