ISO/IEC 15417 standard specifies Code128. Code128 barcode can encode alpha-numeric data or numbers.

Code128 has three subsets: code128A, code128B, and code128C.

Code128A is used to encode uppercase alpha and control characters.

Code128B is used to encode both uppercase and lowercase alpha and numeric data.

Code128C is used to encode numeric-only data. USS Code128 uses subset C.

As mentioned in Wikipedia, this is the mapping table of Barcodesoft Code128 Barcode Font

Code128 Set A	Code128 Set B	Code128 Set C	Mapping	Code128 Set A	Code128 Set B	Code128 Set C	Mapping
Space	Space	00	236 (0xFC)	V	V	54	V
!	!	01	!	W	W	55	W
"	"	02	"	X	X	56	X
#	#	03	#	Y	Y	57	Y
$	$	04	$	Z	Z	58	Z
%	%	05	%	[	[	59	[
&	&	06	&	\	\	60	\
'	'	07	'	]	]	61	]
(	(	08	(	^	^	62	^
)	)	09	)	_	_	63	_
*	*	10	*	NUL	`	64	`
+	+	11	+	SOH	a	65	a
,	,	12	,	STX	b	66	b
-	-	13	-	ETX	c	67	c
.	.	14	.	EOT	d	68	d
/	/	15	/	ENQ	e	69	e
0	0	16	0	ACK	f	70	f
1	1	17	1	BEL	g	71	g
2	2	18	2	BS	h	72	h
3	3	19	3	HT	i	73	i
4	4	20	4	LT	j	74	j
5	5	21	5	VT	k	75	k
6	6	22	6	FF	l	76	l
7	7	23	7	CR	m	77	m
8	8	24	8	SO	n	78	n
9	9	25	9	SI	o	79	o
:	:	26	:	DLE	p	80	p
;	;	27	;	DC1	q	81	q
<	<	28	<	DC2	r	82	r
=	=	29	=	DC3	s	83	s
>	>	30	>	DC4	t	84	t
?	?	31	?	NAK	u	85	u
@	@	32	@	SYN	v	86	v
A	A	33	A	ETB	w	87	w
B	B	34	B	CAN	x	88	x
C	C	35	C	EM	y	89	y
D	D	36	D	SUB	z	90	z
E	E	37	E	ESC	{	91	{
F	F	38	F	FS	\|	92	\|
G	G	39	G	GS	}	93	}
H	H	40	H	RS	~	94	~
I	I	41	I	US	DEL	95	à (0xF0)
J	J	42	J	FNC3	FNC3	96	á (0xF1)
K	K	43	K	FNC2	FNC2	97	â (0xF2)
L	L	44	L	Shift	Shift	98	ã (0xF3)
M	M	45	M	Code C	Code C	99	ä (0xF4)
N	N	46	N	Code B	FNC4	Code B	å (0xF5)
O	O	47	O	FNC4	Code A	Code A	æ (0xF6)
P	P	48	P	FNC1	FNC1	FNC1	ç (0xF7)
Q	Q	49	Q	Start A	Start A	Start A	è (0xF8)
R	R	"50"	R	Start B	Start B	Start B	é (0xF9)
S	S	51	S	Start C	Start C	Start C	ê (0xFA)
T	T	52	T	Stop	Stop	Stop	ë (0xFB)
U	U	53	U

Code128 has many variations, such as EAN128, ISBT128, and GS1128. Since 2004, use of GS1128 symbology has become mandatory for printing labels of Confirmation Services.

Code128 barcode is able to encode the entire ASCII table. With Barcodesoft Keyboard Wedge Emulation program and a USB scanner, you can emulate any special character input into your system.

A check digit is always required by Code128. When you use Barcodesoft Code128 font to print bar code, please use our Encoder to calculate checksum for you. You can also find checksum calculation source code in VBA and C language.

There are 28 code128 barcode fonts in the package, as listed below. Each font shows an aspect ratio by its name. Those code128 fonts with "Hr" in their names have human readable text underneath barcode.

For example, Code128AmHr means ‘medium aspect ratio’, with human readable.

Code128XXL means ‘XXL aspect ratio’, without human readable.

Barcodesoft Code128 Demo has "Demo" watermark.

Barcodesoft Code128 barcode fonts are available in true type, PostScript, PCL, SVG, Open Type (eot), and Web Open Font Format (woff / woff2). Users can embed Code128 fonts into Adobe PDF files.

Here is the list of Barcodesoft Code128 Barcode Fonts

Aspect Ratio	No Human Readable	Set A with human readable	Set B with human readable	Set C with human readable
XXS	Code128XXSHr	Code128AXXS	Code128BXXS	Code128CXXS
XS	Code128XSHr	Code128AXS	Code128BXS	Code128CXS
S	Code128SHr	Code128AS	Code128BS	Code128CS
M	Code128MHr	Code128AM	Code128BM	Code128CM
L	Code128LHr	Code128AL	Code128BL	Code128CL
XL	Code128XLHr	Code128AXL	Code128BXL	Code128CXL
XXL	Code128XXLHr	Code128AXXL	Code128BXXL	Code128CXXL