ASCII

From HwB

ASCII=American Standard Code for Information Interchange

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

Contents

Format control

BS

Backspace. Indicates movement of the printing mechanism or display cursor backwards in one position.

HT

Horizontal Tabulation. Indicates movement of the printing mechanism or display cursor forward to the next preassigned 'tab' or stopping position.

LF

Line Feed. Indicates movement of the printing mechanism or display cursor to the start of the next line (ie one line down).

VT

Vertical Tabulation. Indicates movement of the printing mechanism or display cursor to the next of a series of preassigned printing lines.

FF

Form Feed. Indicates movement of the printing mechanism or display cursor to the starting position of the next page, form, or screen.

CR

Carriage Return. Indicates movement of the printing mechanism or display cursor to the starting position (left) of the current line.

Transmission control

SOH

Start of Heading. Used to indicate the start of a heading which may contain address or routing information.

STX

Start of Text. used to indicate the start of the text and so also indicates the end of the heading.

ETX

End of Text. Used to terminate the text which was started with STX. End of Transmission indicates the end of a transmission which may have included one or more 'texts' with their headings.

ENQ

Enquiry. A request for a response from a remote station. It may be used as a "who are you?" request for a station to identify itself.

ACK

Acknowledge. A character transmitted by a receiving device as an affirmation response to a sender. It is used as a positive response to polling messages.

NAK

Negative Acknowledgement. A character transmitted by a receiving device as a negative response to a sender. It is used as a negative response to polling messages.

SYN

Synchronous/Idle. Used by a synchronous transmission system to achieve synchronisation. When no data is being sent a synchronous transmission system may send SYN characters continuously.

ETB

End of Transmission Block. Indicates the end of a block of data for communication purposes. It is used for blocking data where the block structure is not necessarily related to the processing format.

Information separator

FS

File Separator.

GS

Group Separator.

RS

Record Separtator.

US

Unit Separator.

Information separators to be used in an optional manner except that their heirarchy shall be FS (the most inclusive) to US (the least inclusive).

Miscellaneous

NUL

Null. No character. Used for filling in time or filling space on tape when there is no data.

BEL

Bell. Used when there is need to call human attention. It may control alarm or attention devices.

SO

Shift Out. Indicates that the code combinations which follow shall be interpreted as _outside_ the standard character set until an SI character is reached.

SI

Shift In. Indicates that the code combinations which follow shall be interpreted according to the standard character set.

DLE

Data Link Escape. A character which shall change the meaning of one or more contiguously following characters. It can provide supplementary controls or permits the sending of data characters having any bit combination.

DC1, DC2, DC3, DC4

Device Controls. Characters for the control of ancillary devices or special terminal features.

CAN

Cancel. Indicates that the data which preceeds it in a message or block should be disregarded (usually because an error has been detected).

EM

End of Medium. Indicates the physical end of a card, tape or other medium, or the end of the required or used portion of the medium.

SUB

Substitute. Substituted for a character that is found to be erroneous or invalid.

ESC

Escape. A character intended to provide code extension in that it gives a specified number of contiguously following characters an alternate meaning.

SP

Space. A nonprinting character used to separate words, or to move the printing mechanism or display cursor forward by one position.

DEL

Delete. Used to obliterate unwanted characters (for example, on paper tape by punching a hole in _every_ bit position).

Contributions

Sources

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