Appendix A. Characters and Keys
Table A-1. ASCII characters
Decimal code |
Hex code |
Character |
Description |
---|---|---|---|
0 |
00 |
NUL |
Null |
1 |
01 |
SOH |
Start of heading |
2 |
02 |
STX |
Start of text |
3 |
03 |
ETX |
End of text |
4 |
04 |
EOT |
End of transmit |
5 |
05 |
ENQ |
Enquiry |
6 |
06 |
ACK |
Acknowledge |
7 |
07 |
BEL |
Audible bell |
8 |
08 |
BS |
Backspace |
9 |
09 |
HT |
Horizontal tab |
10 |
0A |
LF |
Line feed |
11 |
0B |
VT |
Vertical tab |
12 |
0C |
FF |
Form feed |
13 |
0D |
CR |
Carriage return |
14 |
0E |
SO |
Shift out |
15 |
0F |
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 |
SYM |
Synchronous idle |
23 |
17 |
ETB |
End transmission block |
24 |
18 |
CAN |
Cancel |
25 |
19 |
EM |
End of medium |
26 |
1A |
SUB |
Substitution |
27 |
1B |
ESC |
Escape |
28 |
1C |
FS |
File separator |
29 |
1D |
GS |
Group separator |
30 |
1E |
RS |
Record separator |
31 |
1F |
US |
Unit separator |
32 |
20 |
Space |
Space in text |
33 |
21 |
! |
Exclamation point |
34 |
22 |
" |
Double quote |
35 |
23 |
# |
Number or pound sign, hash, octothorp |
36 |
24 |
$ |
Dollar sign |
37 |
25 |
% |
Percent sign |
38 |
26 |
& |
Ampersand |
39 |
27 |
' |
Single close-quote, apostrophe |
40 |
28 |
( |
Left parenthesis |
41 |
29 |
) |
Right parenthesis |
42 |
2A |
* |
Asterisk |
43 |
2B |
+ |
Plus sign |
44 |
2C |
, |
Comma |
45 |
2D |
- |
Hyphen / minus |
46 |
2E |
. |
Period |
47 |
2F |
/ |
Slash |
48 |
30 |
0 |
The number zero |
49 |
31 |
1 |
The number one |
50 |
32 |
2 |
The number two |
51 |
33 |
3 |
The ... |
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