Code One

Code One supports all 256 ASCII characters, 1 pad/message separator character, and 8-bit binary data.

There are ten different versions of Code One. Versions A, B, C, D, E, F, G, and H are used in most applications. Versions S and T are a different structure from the other versions. Version S was designed for high-speed printing on an eight-nozzle inkjet printer and version T was designed for a 16-nozzle inkjet. Each version has different sizes, patterns, and data capacities. Each Code One symbol consists of dark or light square data modules and fixed patterns that are used for recognition and reference. All versions are designed to accept different amounts of data as shown in the table below.

Version	Alphanumeric Capacity (in modules)	Numeric Capacity (in modules)	Full ASCII Capacity
S-10	N/A	6	N/A
S-20	N/A	12	N/A
S-30	N/A	18	N/A
T-16	13	22	10
T-32	34	56	24
T-48	55	90	38
A	13	22	10
B	27	44	19
C	64	104	44
D	135	217	91
E	271	435	182
F	553	886	370
G	1096	1755	732
H	2218	3550	1480

All Code One symbols contain Reed Solomon error correction characters. The amount of error correction characters is not user definable and depends on which version is used.

All ten of Code One's versions have different sizes based on the amount of data entered as listed in the table below. The sizes shown are in modules, which are equivalent to the X-dimension selected. Note that versions S and T are available in three different sizes each.

Version	Max. Width (in modules)	Max. Height (in modules)
S-10	13	9
S-20	23	9
S-30	33	9
T-16	19	17
T-32	35	17
T-48	51	17
A	18	16
B	22	22
C	32	28
D	42	40
E	54	52
F	76	70
G	98	104
H	134	148

Versions A through H require no quiet zone at all on any side. Versions S and T require a minimum of 1X, where "X" is the current X-dimension, on all sides.