[thirdparty/man-pages.git] / man / man7 / ascii.7

'\" t
.\" Copyright (c) 1993 Michael Haardt (michael@moria.de)
.\"
.\" SPDX-License-Identifier: GPL-2.0-or-later
.\"
.\" Created  1993-04-02 by Michael Haardt (michael@moria.de)
.\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
.\" Modified 1994-05-15 by Daniel Quinlan (quinlan@yggdrasil.com)
.\" Modified 1994-11-22 by Daniel Quinlan (quinlan@yggdrasil.com)
.\" Modified 1995-07-11 by Daniel Quinlan (quinlan@yggdrasil.com)
.\" Modified 1996-12-18 by Michael Haardt and aeb
.\" Modified 1999-05-31 by Dimitri Papadopoulos (dpo@club-internet.fr)
.\" Modified 1999-08-08 by Michael Haardt (michael@moria.de)
.\" Modified 2004-04-01 by aeb
.\"
.TH ascii 7 (date) "Linux man-pages (unreleased)"
.SH NAME
ascii \- ASCII character set encoded in octal, decimal,
and hexadecimal
.SH DESCRIPTION
ASCII is the American Standard Code for Information Interchange.
It is a 7-bit code.
Many 8-bit codes (e.g., ISO/IEC\~8859-1) contain ASCII as their lower half.
The international counterpart of ASCII is known as ISO/IEC\~646-IRV.
.P
The following table contains the 128 ASCII characters.
.P
C program \f(CW\[aq]\eX\[aq]\fP escapes are noted.
.P
.EX
.TS
l l l l | l l l l.
Oct	Dec	Hex	Char	Oct	Dec	Hex	Char
_
000	0	00	NUL \[aq]\e0\[aq] (null character)	100	64	40	@
001	1	01	SOH (start of heading)	101	65	41	A
002	2	02	STX (start of text)	102	66	42	B
003	3	03	ETX (end of text)	103	67	43	C
004	4	04	EOT (end of transmission)	104	68	44	D
005	5	05	ENQ (enquiry)	105	69	45	E
006	6	06	ACK (acknowledge)	106	70	46	F
007	7	07	BEL \[aq]\ea\[aq] (bell)	107	71	47	G
010	8	08	BS  \[aq]\eb\[aq] (backspace)	110	72	48	H
011	9	09	HT  \[aq]\et\[aq] (horizontal tab)	111	73	49	I
012	10	0A	LF  \[aq]\en\[aq] (new line)	112	74	4A	J
013	11	0B	VT  \[aq]\ev\[aq] (vertical tab)	113	75	4B	K
014	12	0C	FF  \[aq]\ef\[aq] (form feed)	114	76	4C	L
015	13	0D	CR  \[aq]\er\[aq] (carriage ret)	115	77	4D	M
016	14	0E	SO  (shift out)	116	78	4E	N
017	15	0F	SI  (shift in)	117	79	4F	O
020	16	10	DLE (data link escape)	120	80	50	P
021	17	11	DC1 (device control 1)	121	81	51	Q
022	18	12	DC2 (device control 2)	122	82	52	R
023	19	13	DC3 (device control 3)	123	83	53	S
024	20	14	DC4 (device control 4)	124	84	54	T
025	21	15	NAK (negative ack.)	125	85	55	U
026	22	16	SYN (synchronous idle)	126	86	56	V
027	23	17	ETB (end of trans. blk)	127	87	57	W
030	24	18	CAN (cancel)	130	88	58	X
031	25	19	EM  (end of medium)	131	89	59	Y
032	26	1A	SUB (substitute)	132	90	5A	Z
033	27	1B	ESC (escape)	133	91	5B	[
034	28	1C	FS  (file separator)	134	92	5C	\e  \[aq]\e\e\[aq]
035	29	1D	GS  (group separator)	135	93	5D	]
036	30	1E	RS  (record separator)	136	94	5E	\[ha]
037	31	1F	US  (unit separator)	137	95	5F	\&_
040	32	20	SPACE	140	96	60	\`
041	33	21	!	141	97	61	a
042	34	22	"	142	98	62	b
043	35	23	#	143	99	63	c
044	36	24	$	144	100	64	d
045	37	25	%	145	101	65	e
046	38	26	&	146	102	66	f
047	39	27	\[aq]	147	103	67	g
050	40	28	(	150	104	68	h
051	41	29	)	151	105	69	i
052	42	2A	*	152	106	6A	j
053	43	2B	+	153	107	6B	k
054	44	2C	,	154	108	6C	l
055	45	2D	\-	155	109	6D	m
056	46	2E	.	156	110	6E	n
057	47	2F	/	157	111	6F	o
060	48	30	0	160	112	70	p
061	49	31	1	161	113	71	q
062	50	32	2	162	114	72	r
063	51	33	3	163	115	73	s
064	52	34	4	164	116	74	t
065	53	35	5	165	117	75	u
066	54	36	6	166	118	76	v
067	55	37	7	167	119	77	w
070	56	38	8	170	120	78	x
071	57	39	9	171	121	79	y
072	58	3A	:	172	122	7A	z
073	59	3B	;	173	123	7B	{
074	60	3C	<	174	124	7C	|
075	61	3D	= 	175	125	7D	}
076	62	3E	>	176	126	7E	\[ti]
077	63	3F	?	177	127	7F	DEL
.TE
.EE
.SS Tables
For convenience, below are more compact tables in hex and decimal.
.P
.EX
   2 3 4 5 6 7       30 40 50 60 70 80 90 100 110 120
 -------------      ---------------------------------
0:   0 @ P \` p     0:    (  2  <  F  P  Z  d   n   x
1: ! 1 A Q a q     1:    )  3  =  G  Q  [  e   o   y
2: " 2 B R b r     2:    *  4  >  H  R  \e  f   p   z
3: # 3 C S c s     3: !  +  5  ?  I  S  ]  g   q   {
4: $ 4 D T d t     4: "  ,  6  @  J  T  \[ha]  h   r   |
5: % 5 E U e u     5: #  \-  7  A  K  U  _  i   s   }
6: & 6 F V f v     6: $  .  8  B  L  V  \`  j   t   \[ti]
7: \[aq] 7 G W g w     7: %  /  9  C  M  W  a  k   u  DEL
8: ( 8 H X h x     8: &  0  :  D  N  X  b  l   v
9: ) 9 I Y i y     9: \[aq]  1  ;  E  O  Y  c  m   w
A: * : J Z j z
B: + ; K [ k {
C: , < L \e l |
D: \- = M ] m }
E: . > N \[ha] n \[ti]
F: / ? O _ o DEL
.EE
.SH NOTES
.SS History
/etc/ascii (VII) appears in the UNIX Programmer's Manual.
.P
On older terminals, the underscore code is displayed as a left arrow,
called backarrow, the caret is displayed as an up-arrow and the vertical
bar has a hole in the middle.
.P
Uppercase and lowercase characters differ by just one bit and the
ASCII character 2 differs from the double quote by just one bit, too.
That made it much easier to encode characters mechanically or with a
non-microcontroller-based electronic keyboard and that pairing was found
on old teletypes.
.P
The ASCII standard was published by the United States of America
Standards Institute (USASI) in 1968.
.\"
.\" ASA was the American Standards Association and X3 was an ASA sectional
.\" committee on computers and data processing.  Its name changed to
.\" American National Standards Committee X3 (ANSC-X3) and now it is known
.\" as Accredited Standards Committee X3 (ASC X3).  It is accredited by ANSI
.\" and administered by ITI.  The subcommittee X3.2 worked on coded
.\" character sets; the task group working on ASCII appears to have been
.\" designated X3.2.4.  In 1966, ASA became the United States of America
.\" Standards Institute (USASI) and published ASCII in 1968.  It became the
.\" American National Standards Institute (ANSI) in 1969 and is the
.\" U.S. member body of ISO; private and nonprofit.
.\"
.SH SEE ALSO
.BR charsets (7),
.BR iso_8859\-1 (7),
.BR iso_8859\-2 (7),
.BR iso_8859\-3 (7),
.BR iso_8859\-4 (7),
.BR iso_8859\-5 (7),
.BR iso_8859\-6 (7),
.BR iso_8859\-7 (7),
.BR iso_8859\-8 (7),
.BR iso_8859\-9 (7),
.BR iso_8859\-10 (7),
.BR iso_8859\-11 (7),
.BR iso_8859\-13 (7),
.BR iso_8859\-14 (7),
.BR iso_8859\-15 (7),
.BR iso_8859\-16 (7),
.BR utf\-8 (7)
Commit	Line	Data
a1eaacb1	1	'\" t
fea681da	2	.\" Copyright (c) 1993 Michael Haardt (michael@moria.de)
fea681da	3	.\"
e4a74ca8	4	.\" SPDX-License-Identifier: GPL-2.0-or-later
fea681da	5	.\"
5ef5222a	6	.\" Created 1993-04-02 by Michael Haardt (michael@moria.de)
fea681da MK	7	.\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
	8	.\" Modified 1994-05-15 by Daniel Quinlan (quinlan@yggdrasil.com)
	9	.\" Modified 1994-11-22 by Daniel Quinlan (quinlan@yggdrasil.com)
	10	.\" Modified 1995-07-11 by Daniel Quinlan (quinlan@yggdrasil.com)
	11	.\" Modified 1996-12-18 by Michael Haardt and aeb
	12	.\" Modified 1999-05-31 by Dimitri Papadopoulos (dpo@club-internet.fr)
	13	.\" Modified 1999-08-08 by Michael Haardt (michael@moria.de)
	14	.\" Modified 2004-04-01 by aeb
	15	.\"
4c1c5274	16	.TH ascii 7 (date) "Linux man-pages (unreleased)"
fea681da	17	.SH NAME
5ef5222a MM	18	ascii \- ASCII character set encoded in octal, decimal,
5ef5222a MM	19	and hexadecimal
fea681da MK	20	.SH DESCRIPTION
fea681da MK	21	ASCII is the American Standard Code for Information Interchange.
c13182ef	22	It is a 7-bit code.
3ed1de0d	23	Many 8-bit codes (e.g., ISO/IEC\~8859-1) contain ASCII as their lower half.
fb464449	24	The international counterpart of ASCII is known as ISO/IEC\~646-IRV.
c6d039a3	25	.P
fea681da	26	The following table contains the 128 ASCII characters.
c6d039a3	27	.P
b957f81f	28	C program \f(CW\[aq]\eX\[aq]\fP escapes are noted.
c6d039a3	29	.P
71b02c05	30	.EX
fea681da	31	.TS
33e2aa41	32	l l l l \| l l l l.
2ce70b17	33	Oct Dec Hex Char Oct Dec Hex Char
fea681da	34	_
b957f81f	35	000 0 00 NUL \[aq]\e0\[aq] (null character) 100 64 40 @
2ce70b17 MK	36	001 1 01 SOH (start of heading) 101 65 41 A
	37	002 2 02 STX (start of text) 102 66 42 B
	38	003 3 03 ETX (end of text) 103 67 43 C
	39	004 4 04 EOT (end of transmission) 104 68 44 D
	40	005 5 05 ENQ (enquiry) 105 69 45 E
	41	006 6 06 ACK (acknowledge) 106 70 46 F
b957f81f AC	42	007 7 07 BEL \[aq]\ea\[aq] (bell) 107 71 47 G
	43	010 8 08 BS \[aq]\eb\[aq] (backspace) 110 72 48 H
	44	011 9 09 HT \[aq]\et\[aq] (horizontal tab) 111 73 49 I
	45	012 10 0A LF \[aq]\en\[aq] (new line) 112 74 4A J
	46	013 11 0B VT \[aq]\ev\[aq] (vertical tab) 113 75 4B K
	47	014 12 0C FF \[aq]\ef\[aq] (form feed) 114 76 4C L
	48	015 13 0D CR \[aq]\er\[aq] (carriage ret) 115 77 4D M
2ce70b17 MK	49	016 14 0E SO (shift out) 116 78 4E N
	50	017 15 0F SI (shift in) 117 79 4F O
	51	020 16 10 DLE (data link escape) 120 80 50 P
	52	021 17 11 DC1 (device control 1) 121 81 51 Q
	53	022 18 12 DC2 (device control 2) 122 82 52 R
	54	023 19 13 DC3 (device control 3) 123 83 53 S
	55	024 20 14 DC4 (device control 4) 124 84 54 T
	56	025 21 15 NAK (negative ack.) 125 85 55 U
	57	026 22 16 SYN (synchronous idle) 126 86 56 V
	58	027 23 17 ETB (end of trans. blk) 127 87 57 W
	59	030 24 18 CAN (cancel) 130 88 58 X
	60	031 25 19 EM (end of medium) 131 89 59 Y
	61	032 26 1A SUB (substitute) 132 90 5A Z
	62	033 27 1B ESC (escape) 133 91 5B [
b957f81f	63	034 28 1C FS (file separator) 134 92 5C \e \[aq]\e\e\[aq]
2ce70b17	64	035 29 1D GS (group separator) 135 93 5D ]
a1e9245d	65	036 30 1E RS (record separator) 136 94 5E \[ha]
2ce70b17 MK	66	037 31 1F US (unit separator) 137 95 5F \&_
	67	040 32 20 SPACE 140 96 60 \`
	68	041 33 21 ! 141 97 61 a
	69	042 34 22 " 142 98 62 b
	70	043 35 23 # 143 99 63 c
	71	044 36 24 $ 144 100 64 d
	72	045 37 25 % 145 101 65 e
	73	046 38 26 & 146 102 66 f
b957f81f	74	047 39 27 \[aq] 147 103 67 g
2ce70b17 MK	75	050 40 28 ( 150 104 68 h
	76	051 41 29 ) 151 105 69 i
	77	052 42 2A * 152 106 6A j
	78	053 43 2B + 153 107 6B k
	79	054 44 2C , 154 108 6C l
	80	055 45 2D \- 155 109 6D m
	81	056 46 2E . 156 110 6E n
	82	057 47 2F / 157 111 6F o
	83	060 48 30 0 160 112 70 p
	84	061 49 31 1 161 113 71 q
	85	062 50 32 2 162 114 72 r
	86	063 51 33 3 163 115 73 s
	87	064 52 34 4 164 116 74 t
	88	065 53 35 5 165 117 75 u
	89	066 54 36 6 166 118 76 v
	90	067 55 37 7 167 119 77 w
	91	070 56 38 8 170 120 78 x
	92	071 57 39 9 171 121 79 y
	93	072 58 3A : 172 122 7A z
	94	073 59 3B ; 173 123 7B {
	95	074 60 3C < 174 124 7C \|
	96	075 61 3D = 175 125 7D }
3f029bc9	97	076 62 3E > 176 126 7E \[ti]
2ce70b17	98	077 63 3F ? 177 127 7F DEL
fea681da	99	.TE
71b02c05	100	.EE
c0f153c6	101	.SS Tables
5ef5222a	102	For convenience, below are more compact tables in hex and decimal.
c6d039a3	103	.P
71b02c05	104	.EX
c0f153c6 MK	105	2 3 4 5 6 7 30 40 50 60 70 80 90 100 110 120
c0f153c6 MK	106	------------- ---------------------------------
185ec3e4	107	0: 0 @ P \` p 0: ( 2 < F P Z d n x
c0f153c6	108	1: ! 1 A Q a q 1: ) 3 = G Q [ e o y
31a6818e	109	2: " 2 B R b r 2: * 4 > H R \e f p z
c0f153c6	110	3: # 3 C S c s 3: ! + 5 ? I S ] g q {
a1e9245d	111	4: $ 4 D T d t 4: " , 6 @ J T \[ha] h r \|
c0f153c6	112	5: % 5 E U e u 5: # \- 7 A K U _ i s }
3f029bc9	113	6: & 6 F V f v 6: $ . 8 B L V \` j t \[ti]
b957f81f	114	7: \[aq] 7 G W g w 7: % / 9 C M W a k u DEL
c0f153c6	115	8: ( 8 H X h x 8: & 0 : D N X b l v
b957f81f	116	9: ) 9 I Y i y 9: \[aq] 1 ; E O Y c m w
c0f153c6 MK	117	A: * : J Z j z
c0f153c6 MK	118	B: + ; K [ k {
31a6818e	119	C: , < L \e l \|
c0f153c6	120	D: \- = M ] m }
a1e9245d	121	E: . > N \[ha] n \[ti]
c0f153c6	122	F: / ? O _ o DEL
71b02c05	123	.EE
889829be MK	124	.SH NOTES
889829be MK	125	.SS History
2ff309be	126	/etc/ascii (VII) appears in the UNIX Programmer's Manual.
c6d039a3	127	.P
fea681da MK	128	On older terminals, the underscore code is displayed as a left arrow,
	129	called backarrow, the caret is displayed as an up-arrow and the vertical
	130	bar has a hole in the middle.
c6d039a3	131	.P
fea681da MK	132	Uppercase and lowercase characters differ by just one bit and the
	133	ASCII character 2 differs from the double quote by just one bit, too.
	134	That made it much easier to encode characters mechanically or with a
	135	non-microcontroller-based electronic keyboard and that pairing was found
	136	on old teletypes.
c6d039a3	137	.P
fea681da MK	138	The ASCII standard was published by the United States of America
	139	Standards Institute (USASI) in 1968.
	140	.\"
	141	.\" ASA was the American Standards Association and X3 was an ASA sectional
	142	.\" committee on computers and data processing. Its name changed to
	143	.\" American National Standards Committee X3 (ANSC-X3) and now it is known
	144	.\" as Accredited Standards Committee X3 (ASC X3). It is accredited by ANSI
	145	.\" and administered by ITI. The subcommittee X3.2 worked on coded
	146	.\" character sets; the task group working on ASCII appears to have been
	147	.\" designated X3.2.4. In 1966, ASA became the United States of America
	148	.\" Standards Institute (USASI) and published ASCII in 1968. It became the
	149	.\" American National Standards Institute (ANSI) in 1969 and is the
24b74457	150	.\" U.S. member body of ISO; private and nonprofit.
fea681da	151	.\"
47297adb	152	.SH SEE ALSO
5ef5222a	153	.BR charsets (7),
28a4c58c MK	154	.BR iso_8859\-1 (7),
	155	.BR iso_8859\-2 (7),
	156	.BR iso_8859\-3 (7),
	157	.BR iso_8859\-4 (7),
	158	.BR iso_8859\-5 (7),
	159	.BR iso_8859\-6 (7),
	160	.BR iso_8859\-7 (7),
	161	.BR iso_8859\-8 (7),
	162	.BR iso_8859\-9 (7),
	163	.BR iso_8859\-10 (7),
	164	.BR iso_8859\-11 (7),
	165	.BR iso_8859\-13 (7),
	166	.BR iso_8859\-14 (7),
	167	.BR iso_8859\-15 (7),
	168	.BR iso_8859\-16 (7),
	169	.BR utf\-8 (7)