dec
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
hex
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
binary
0000 0000
0000 0001
0000 0010
0000 0011
0000 0100
0000 0101
0000 0110
0000 0111
0000 1000
0000 1001
0000 1010
0000 1011
0000 1100
0000 1101
0000 1110
0000 1111
0001 0000
0001 0001
0001 0010
0001 0011
0001 0100
0001 0101
0001 0110
0001 0111
0001 1000
0001 1001
0001 1010
0001 1011
0001 1100
octal
000
001
002
003
004
005
006
007
010
011
012
013
014
015
016
017
020
021
022
023
024
025
026
027
030
031
032
033
034
HTML
ASCII
NUL
SOH
STX
ETX
EOT
ENQ
ACK
BEL
BS
HT
LF
VT
FF
CR
SO
SI
DLE
DC1
DC2
DC3
DC4
NAK
SYN
ETB
CAN
EM
SUB
ESC
FS
Meaning
Null code (blank, empty, nothing, nada, zip)
Start of message header
Start of text
End of text
End of transmission
Enquiry (asking if the other system is alive and on-line)
Acknowledge (a positive response to an enquiry)
Bell (used when teletypes had bells, now just beeps)
Bask Space
Horizontal tab
Line Feed (on UNIX systems it starts a new line also)
Vertical tab
Form Feed
Carriage Return (start a new line)
Shift Out (shift to an alternate character set)
Shift In (switch back to the default character set)
Data Link Escape
Device Control 1 (usually XON)
Device Control 2
Device Control 3 (usually XOFF)
Device Control 4
Negative Acknowledge (a negative response to an enquiry)
Synchronous Idle (no data to transmit but keep the line open)
End Transmission Block (end of paragraph, kind of)
Cancel (cancel the last command sent)
End of Medium (end of tape back when tape was used)
Substitute
Escape (exit a command sequence, escape key on the keyboard)
File Separator
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
1D
1E
1F
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
0001 1101
0001 1110
0001 1111
0010 0000
0010 0001
0010 0010
0010 0011
0010 0100
0010 0101
0010 0110
0010 0111
0010 1000
0010 1001
0010 1010
0010 1011
0010 1100
0010 1101
0010 1110
0010 1111
0011 0000
0011 0001
0011 0010
0011 0011
0011 0100
0011 0101
0011 0110
0011 0111
0011 1000
0011 1001
0011 1010
0011 1011
035
036
037
040
041
042
043
044
045
046
047
050
051
052
053
054
055
056
057
060
061
062
063
064
065
066
067
070
071
072
073
 
!
"
#
$
%
&
'
(
)
*
+
,
-
.
/
0
1
2
3
4
5
6
7
8
9
:
&#59;
GS
RS
US
(sp)
!
“
#
$
%
&
‘
(
)
*
+
,
.
/
0
1
2
3
4
5
6
7
8
9
:
;
Group Separator
Record Separator
Unit Separator
Space bar
Exclamation point
Quotation mark
Cross hatch, pound sign, octothorpe
Dollar sign, sonne
Percent sign
Ampersand
Apostrophe
Open curved bracket, left parenthesis
Close curve bracket, right parenthesis
Astrisk
Plus sign
Comma
Hyphen, bithorpe
Period
Forward slash, right slash or stroke, virgule, solidus
Zero
One
Colon
Semicolon
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
3C
3D
3E
3F
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
50
51
52
53
54
55
56
57
58
59
5A
0011 1100
0011 1101
0011 1110
0011 1111
0100 0000
0100 0001
0100 0010
0100 0011
0100 0100
0100 0101
0100 0110
0100 0111
0100 1000
0100 1001
0100 1010
0100 1011
0100 1100
0100 1101
0100 1110
0100 1111
0101 0000
0101 0001
0101 0010
0101 0011
0101 0100
0101 0101
0101 0110
0101 0111
0101 1000
0101 1001
0101 1010
074
075
076
077
100
101
102
103
104
105
106
107
110
111
112
113
114
115
116
117
120
121
122
123
124
125
126
127
130
131
132
<
=
>
?
@
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
<
=
>
?
@
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Less than symbol, left angle bracket, left chevron
Equal sign, quadrathorpe
Greater than symbol, right angle bracket, right chevron
Question mark, whatmark
Blivet (“at” symbol)
Letter oh
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
5B
5C
5D
5E
5F
60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E
6F
70
71
72
73
74
75
76
77
78
79
0101 1011
0101 1100
0101 1101
0101 1110
0101 1111
0110 0000
0110 0001
0110 0010
0110 0011
0110 0100
0110 0101
0110 0110
0110 0111
0110 1000
0110 1001
0110 1010
0110 1011
0110 1100
0110 1101
0110 1110
0110 1111
0111 0000
0111 0001
0111 0010
0111 0011
0111 0100
0111 0101
0111 0110
0111 0111
0111 1000
0111 1001
133
134
135
136
137
140
141
142
143
144
145
146
147
150
151
152
153
154
155
156
157
160
161
162
163
164
165
166
167
170
171
&#91;
&#92;
&#93;
&#94;
&#95;
&#96;
&#97;
&#98;
&#99;
&#100;
&#101;
&#102;
&#103;
&#104;
&#105;
&#106;
&#107;
&#108;
&#109;
&#110;
&#111;
&#112;
&#113;
&#114;
&#115;
&#116 ;
&#117;
&#118;
&#119;
&#120;
&#121;
[
\
]
^
_
`
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
Open square bracket
Backslash, reversed vertigule
Close square bracket
Carat, circumflex
Underscore
Grave, unapostraphe
Lower case oh
122
123
124
125
126
127
7A
7B
7C
7D
7E
7F
0111 1010
0111 1011
0111 1100
0111 1101
0111 1110
0111 1111
172
173
174
175
176
177
&#122;
&#123;
&#124;
&#125;
&#126;
&#127;
z
{
|
}
~
DEL
Open curly bracket, left brace
Pipe, vertical bar
Close curly bracket, right brace
Tilde, enyay
Delete last character sent