226
Chapter 7Bar Codes
Check Digit
The optional modulo-43 check digit can be inserted into the bar code to verify
accurate scanning.
NOTE: Character pairs /M, /N, and /P through /Y are reserved for future
control character pairs.
Table 66.Code39Character Set
ASCII CODE 39ASCII CODE 39ASCII CODE 39ASCII CODE 39
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
GS
RS
US
%U
$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
SP
!
"
#
$
%
&
'
(
)
*
+
,
—
.
/
0
1
2
3
4
5
6
7
8
9
:
;
<
=
>
?
Space
/A
/B
/C
/D
/E
/F
/G
/H
/I
/J
/K
/L
—
.
/O
0
1
2
3
4
5
6
7
8
9
/Z
%F
%G
%H
%I
%J
@
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
[
\
]
^
__
%V
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
%K
%L
%M
%N
%O
`
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
{
|
}
~
DEL
%W
+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
%P
%Q
%R
%S
%T%X
%Y%Z