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The first 32 of the 128 ASCII characters are non-graphic and are intended for the control of some aspect of transmission or display. The control characters explicitly used or recognised by UNIX are
Numeric |
Description |
UNIX |
|
Value |
Name |
||
004 |
eot |
end of transmission |
004 |
or (control-D) |
|||
010 |
bs |
back space |
010 |
011 |
ht |
(horizontal) tab |
’\t’ |
012 |
nl |
new line or line feed |
FORM |
014 |
np |
new page or form feed |
’\r’ |
015 |
cr |
carriage return |
’\n’ |
034 |
fs |
file separator or quit |
CQUIT |
040 |
sp |
forward space or blank |
’ ’ |
0177 |
del |
delete |
CINTR |
It will be noted that the last two of these belong to the last 96 characters or the graphic portion, of the code.
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