Appendix C - ASCII Chart

ASCII stands for American Standard Code for Information Interchange. Computers can only understand numbers, so an ASCII code is the numerical representation of a character such as a or @ or an action of some sort. ASCII was developed a long time ago and now the non-printing characters are rarely used for their original purpose.

The following chart contains all 128 ASCII decimal (dec), octal (oct), hexadecimal (hex) and character (ch) codes and this includes descriptions of the first 32 non-printing characters. ASCII was actually designed for use with teletypes and so the descriptions are somewhat dated.

Decimal	Octal	Hexidecimal	Description
0	0	00	NUL (null)
1	1	01	SOH (start of header)
2	2	02	STX (start of text)
3	3	03	ETX (end of text)
4	4	04	EOT (end of transmission)
5	5	05	ENQ (enquiry)
6	6	06	ACK (acknowledge)
7	7	07	BEL (bell)
8	10	08	BS (backspace)
9	11	09	HT (horizontal tab)
10	12	0a	LF (line feed/new line)
11	13	0b	VT (vertical tab)
12	14	0c	FF (form feed/new page)
13	15	0d	CR (carriage return)
14	16	0e	SO (shift out)
15	17	0f	SI (shift in)
16	20	10	DLE (data link escape)
17	21	11	DC1 (device control 1)
18	22	12	DC2 (device control 2)
19	23	13	DC3 (device control 3)
20	24	14	DC4 (device control 4)
21	25	15	NAK (negative acknowledge)
22	26	16	SYN (synchronous idle)
23	27	17	ETB (end of transmission block)
24	30	18	CAN (cancel)
25	31	19	EM (end of medium)
26	32	1a	SUB (substitute)
27	33	1b	ESC (escape)
28	34	1c	FS (file separator)
29	35	1d	GS (group separator)
30	36	1e	RS (record separator)
31	37	1f	US (unit separator)
32	40	20	(space)
33	41	21	!
34	42	22	\
35	43	23	#
36	44	24	$
37	45	25	%
38	46	26	&
39	47	27	’
40	50	28	(
41	51	29	)
42	52	2a	*
43	53	2b	+
44	54	2c	,
45	55	2d	-
46	56	2e	.
47	57	2f	/
48	60	30	0
49	61	31	1
50	62	32	2
51	63	33	3
52	64	34	4
53	65	35	5
54	66	36	6
55	67	37	7
56	70	38	8
57	71	39	9
58	72	3a	:
59	73	3b	;
60	74	3c	<
61	75	3d	=
62	76	3e	>
63	77	3f	?
64	100	40	@
65	101	41	A
66	102	42	B
67	103	43	C
68	104	44	D
69	105	45	E
70	106	46	F
71	107	47	G
72	110	48	H
73	111	49	I
74	112	4a	J
75	113	4b	K
76	114	4c	L
77	115	4d	M
78	116	4e	N
79	117	4f	O
80	120	50	P
81	121	51	Q
82	122	52	R
83	123	53	S
84	124	54	T
85	125	55	U
86	126	56	V
87	127	57	W
88	130	58	X
89	131	59	Y
90	132	5a	Z
91	133	5b	[
92	134	5c	\
93	135	5d	]
94	136	5e	^
95	137	5f	_
96	140	60	`
97	141	61	a
98	142	62	b
99	143	63	c
100	144	64	d
101	145	65	e
102	146	66	f
103	147	67	g
104	150	68	h
105	151	69	i
106	152	6a	j
107	153	6b	k
108	154	6c	l
109	155	6d	m
110	156	6e	n
111	157	6f	o
112	160	70	p
113	161	71	q
114	162	72	r
115	163	73	s
116	164	74	t
117	165	75	u
118	166	76	v
119	167	77	w
120	170	78	x
121	171	79	y
122	172	7a	z
123	173	7b	{
124	174	7c	\|
125	175	7d	}
126	176	7e	~
127	177	7f	DEL (delete)

ASCII Chart

$Id: appendixc.txt,v 1.3 2014/10/31 01:09:04 ayoung Exp $

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