Science Fair Project Encyclopedia
Code 93
Code 93 is a barcode symbology designed to provide a higher density and data security enhancement to Code 39. It is an alphanumeric, variable length symbology. Code 93 is used primarily by Canadian postal office to encode supplementary delivery information. Every symbol includes two check characters.
Code 93 is designed to encode 26 upper case letters, 10 digits and 7 special characters:
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
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
-, ., $, /, +, %, SPACE.
Each Code 93 character is divided into nine modules and always has three bars and three spaces. In this way comes the symbology name.
In addition to 43 characters, Code 93 defines 5 special characters (including a start/stop character), which can be combined with other characters to unambiguously represent all 128 ASCII characters.
In an open system, the minimum value of X dimension is 7.5 mils. the minimum bar height is 15 percent of the symbol length or 0.25 inches, whichever is greater. The starting and trailing quiet zone should be at least 0.25 inches.
Structure of a code 93 barcode
A typical code 93 barcode has the following structure:
- A start character –
- Message encoded
- First check character "C"
- Second check character "K"
- Stop Character -
- Termination bar
Detailed Outline
These tables outline the code 93 specification:
| Legend | |||
| Format1 | Format2 | Desc | Format3 |
| n | w | (n)arrow [w]hite (1x) | ! |
| N | b | (N)arrow [b]lack (1x) | @ |
| a | W | n(a)rrow [W]hite (2x) | # |
| A | B | N(A)rrow [B]lack (2x) | $ |
| w | h | (w)ide W[h]ite (3x) | % |
| W | l | (W)ide B[l]ack (3x) | ^ |
| d | H | wi(d)e W[H]ite (4x) | & |
| D | L | Wi(D)e B[L]ack (4x) | * |
| Code Details | |||||
| ID | Char | BinaryCode | Format1 | Format2 | Format3 |
| 0 | 0 | 100010100 | NwNnNa | bhbwbW | @%@!@# |
| 1 | 1 | 101001000 | NnNaNw | bwbWbh | @!@#@% |
| 2 | 2 | 101000100 | NnNwNa | bwbhbW | @!@%@# |
| 3 | 3 | 101000010 | NnNdNn | bwbHbw | @!@&@! |
| 4 | 4 | 100101000 | NaNnNw | bWbwbh | @#@!@% |
| 5 | 5 | 100100100 | NaNaNa | bWbWbW | @#@#@# |
| 6 | 6 | 100100010 | NaNwNn | bWbhbw | @#@%@! |
| 7 | 7 | 101010000 | NnNnNd | bwbwbH | @!@!@& |
| 8 | 8 | 100010010 | NwNaNn | bhbWbw | @%@#@! |
| 9 | 9 | 100001010 | NdNnNn | bHbwbw | @&@!@! |
| 10 | A | 110101000 | AnNnNw | Bwbwbh | $!@!@% |
| 11 | B | 110100100 | AnNaNa | BwbWbW | $!@#@# |
| 12 | C | 110100010 | AnNwNn | Bwbhbw | $!@%@! |
| 13 | D | 110010100 | AaNnNa | BWbwbW | $#@!@# |
| 14 | E | 110010010 | AaNaNn | BWbWbw | $#@#@! |
| 15 | F | 110001010 | AwNnNn | Bhbwbw | $%@!@! |
| 16 | G | 101101000 | NnAnNw | bwBwbh | @!$!@% |
| 17 | H | 101100100 | NnAaNa | bwBWbW | @!$#@# |
| 18 | I | 101100010 | NnAwNn | bwBhbw | @!$%@! |
| 19 | J | 100110100 | NaAnNa | bWBwbW | @#$!@# |
| 20 | K | 100011010 | NwAnNn | bhBwbw | @%$!@! |
| 21 | L | 101011000 | NnNnAw | bwbwBh | @!@!$% |
| 22 | M | 101001100 | NnNaAa | bwbWBW | @!@#$# |
| 23 | N | 101000110 | NnNwAn | bwbhBw | @!@%$! |
| 24 | O | 100101100 | NaNnAa | bWbwBW | @#@!$# |
| 25 | P | 100010110 | NwNnAn | bhbwBw | @%@!$! |
| 26 | Q | 110110100 | AnAnNa | BwBwbW | $!$!@# |
| 27 | R | 110110010 | AnAaNn | BwBWbw | $!$#@! |
| 28 | S | 110101100 | AnNnAa | BwbwBW | $!@!$# |
| 29 | T | 110100110 | AnNaAn | BwbWBw | $!@#$! |
| 30 | U | 110010110 | AaNnAn | BWbwBw | $#@!$! |
| 31 | V | 110011010 | AaAnNn | BWBwbw | $#$!@! |
| 32 | W | 101101100 | NnAnAa | bwBwBW | @!$!$# |
| 33 | X | 101100110 | NnAaAn | bwBWBw | @!$#$! |
| 34 | Y | 100110110 | NaAnAn | bWBwBw | @#$!$! |
| 35 | Z | 100111010 | NaWnNn | bWlwbw | @#^!@! |
| 36 | - | 100101110 | NaNnWn | bWbwlw | @#@!^! |
| 37 | . | 111010100 | WnNnNa | lwbwbW | ^!@!@# |
| 38 | SPACE | 111010010 | WnNaNn | lwbWbw | ^!@#@! |
| 39 | $ | 111001010 | WaNnNn | lWbwbw | ^#@!@! |
| 40 | / | 101101110 | NnAnWn | bwBwlw | @!$!^! |
| 41 | + | 101110110 | NnWnAn | bwlwBw | @!^!$! |
| 42 | % | 110101110 | AnNnWn | Bwbwlw | $!@!^! |
| 43 | ($) | 100100110 | NaNaAn | bWbWBw | @#@#$! |
| 44 | (%) | 111011010 | WnAnNn | lwBwbw | ^!$!@! |
| 45 | (/) | 111010110 | WnNnAn | lwbwBw | ^!@!$! |
| 46 | (+) | 100110010 | NaAaNn | bWBWbw | @#$#@! |
| - | *Start/Stop | 101011110 | NnNnDn | bwbwLw | @!@!*! |
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