Code 93

<h2 id="structure-of-a-code-93-barcode">Structure of a code 93 barcode</h2>
<p>A typical code 93 barcode has the following structure:
</p>
<ul><li>A start character *</li>
<li>Encoded message</li>
<li>First modulo-47 check character "C"</li>
<li>Second modulo-47 check character "K"</li>
<li>Stop character *</li>
<li>Termination bar</li></ul>
<h2 id="detailed-outline">Detailed outline</h2>
<p>The 48 possible code-93 symbols are as follows. There are actually 
  
    
      
        
          
            
              
                (
              
              
                8
                3
              
              
                )
              
            
          
        
      
    
    {\displaystyle {\tbinom {8}{3}}}
  
 = 56 combinations that satisfy the coding rules, but one would be confused with the stop symbol in reverse, and the other 7 are unused. Codes 43–46 can be prefixed to alphanumeric values to produce all 128 possible ASCII codes. This is done in exactly the same way as <a href="/facts/Code_39/49a4XzMm">Full ASCII Code 39</a>, but uses reserved codes rather than re-using codes 39–42.
</p>
Code 93 bar code<table><tbody><tr><th>ID</th><th>Character</th><th>Widths</th><th>Binary</th><th>ID</th><th>Character</th><th>Widths</th><th>Binary</th></tr><tr><td>0</td><td>0</td><td>131112</td><td>100010100</td><td>28</td><td>S</td><td>211122</td><td>110101100</td></tr><tr><td>1</td><td>1</td><td>111213</td><td>101001000</td><td>29</td><td>T</td><td>211221</td><td>110100110</td></tr><tr><td>2</td><td>2</td><td>111312</td><td>101000100</td><td>30</td><td>U</td><td>221121</td><td>110010110</td></tr><tr><td>3</td><td>3</td><td>111411</td><td>101000010</td><td>31</td><td>V</td><td>222111</td><td>110011010</td></tr><tr><td>4</td><td>4</td><td>121113</td><td>100101000</td><td>32</td><td>W</td><td>112122</td><td>101101100</td></tr><tr><td>5</td><td>5</td><td>121212</td><td>100100100</td><td>33</td><td>X</td><td>112221</td><td>101100110</td></tr><tr><td>6</td><td>6</td><td>121311</td><td>100100010</td><td>34</td><td>Y</td><td>122121</td><td>100110110</td></tr><tr><td>7</td><td>7</td><td>111114</td><td>101010000</td><td>35</td><td>Z</td><td>123111</td><td>100111010</td></tr><tr><td>8</td><td>8</td><td>131211</td><td>100010010</td><td>36</td><td>-</td><td>121131</td><td>100101110</td></tr><tr><td>9</td><td>9</td><td>141111</td><td>100001010</td><td>37</td><td>.</td><td>311112</td><td>111010100</td></tr><tr><td>10</td><td>A</td><td>211113</td><td>110101000</td><td>38</td><td>SPACE</td><td>311211</td><td>111010010</td></tr><tr><td>11</td><td>B</td><td>211212</td><td>110100100</td><td>39</td><td>$</td><td>321111</td><td>111001010</td></tr><tr><td>12</td><td>C</td><td>211311</td><td>110100010</td><td>40</td><td>/</td><td>112131</td><td>101101110</td></tr><tr><td>13</td><td>D</td><td>221112</td><td>110010100</td><td>41</td><td>+</td><td>113121</td><td>101110110</td></tr><tr><td>14</td><td>E</td><td>221211</td><td>110010010</td><td>42</td><td>%</td><td>211131</td><td>110101110</td></tr><tr><td>15</td><td>F</td><td>231111</td><td>110001010</td><td>43</td><td>($)</td><td>121221</td><td>100100110</td></tr><tr><td>16</td><td>G</td><td>112113</td><td>101101000</td><td>44</td><td>(%)</td><td>312111</td><td>111011010</td></tr><tr><td>17</td><td>H</td><td>112212</td><td>101100100</td><td>45</td><td>(/)</td><td>311121</td><td>111010110</td></tr><tr><td>18</td><td>I</td><td>112311</td><td>101100010</td><td>46</td><td>(+)</td><td>122211</td><td>100110010</td></tr><tr><td>19</td><td>J</td><td>122112</td><td>100110100</td><td colspan="2">Start/Stop *</td><td>111141</td><td>101011110</td></tr><tr><td>20</td><td>K</td><td>132111</td><td>100011010</td><td colspan="2">(Reverse stop)</td><td>114111</td><td>101111010</td></tr><tr><td>21</td><td>L</td><td>111123</td><td>101011000</td><td colspan="2" rowspan="7">Unused</td><td>411111</td><td>111101010</td></tr><tr><td>22</td><td>M</td><td>111222</td><td>101001100</td><td>111132</td><td>101011100</td></tr><tr><td>23</td><td>N</td><td>111321</td><td>101000110</td><td>111231</td><td>101001110</td></tr><tr><td>24</td><td>O</td><td>121122</td><td>100101100</td><td>113112</td><td>101110100</td></tr><tr><td>25</td><td>P</td><td>131121</td><td>100010110</td><td>113211</td><td>101110010</td></tr><tr><td>26</td><td>Q</td><td>212112</td><td>110110100</td><td>213111</td><td>110111010</td></tr><tr><td>27</td><td>R</td><td>212211</td><td>110110010</td><td>212121</td><td>110110110</td></tr></tbody></table>
<h2 id="full-ascii-code-93">Full ASCII Code 93</h2>
<p>Code 93 is restricted to 43 characters and 5 special characters. In Full <a href="/facts/ASCII/vGUI33Qu">ASCII</a> Code 93, the 43 basic symbols (0–9, A-Z, "-", ".", "$", "/", "+" and "%") are the same as their representations in Code 93. Lower case letters, additional <a href="/facts/Punctuation/YsE7u4W6">punctuation</a> characters and control characters are represented by sequences of two characters of Code 93.
</p><p>This encoding is the same as Full ASCII Code 39, except that four special-purpose symbols are used, rather than reassigning $, /, + and %:
</p>
<table><tbody><tr><td colspan="15">Code details</td></tr><tr><td>Nr</td><td>Character</td><td>Encoding</td><td rowspan="99">   </td><td>Nr</td><td>Character</td><td>Encoding</td><td rowspan="99">   </td><td>Nr</td><td>Character</td><td>Encoding</td><td rowspan="99">   </td><td>Nr</td><td>Character</td><td>Encoding</td></tr><tr><td>0</td><td>NUL</td><td>(%)U</td><td>32</td><td>[space]</td><td>[space]</td><td>64</td><td>@</td><td>(%)V</td><td>96</td><td>`</td><td>(%)W</td></tr><tr><td>1</td><td>SOH</td><td>($)A</td><td>33</td><td>!</td><td>(/)A</td><td>65</td><td>A</td><td>A</td><td>97</td><td>a</td><td>(+)A</td></tr><tr><td>2</td><td>STX</td><td>($)B</td><td>34</td><td>"</td><td>(/)B</td><td>66</td><td>B</td><td>B</td><td>98</td><td>b</td><td>(+)B</td></tr><tr><td>3</td><td>ETX</td><td>($)C</td><td>35</td><td>#</td><td>(/)C</td><td>67</td><td>C</td><td>C</td><td>99</td><td>c</td><td>(+)C</td></tr><tr><td>4</td><td>EOT</td><td>($)D</td><td>36</td><td>$</td><td>$</td><td>68</td><td>D</td><td>D</td><td>100</td><td>d</td><td>(+)D</td></tr><tr><td>5</td><td>ENQ</td><td>($)E</td><td>37</td><td>%</td><td>%</td><td>69</td><td>E</td><td>E</td><td>101</td><td>e</td><td>(+)E</td></tr><tr><td>6</td><td>ACK</td><td>($)F</td><td>38</td><td>&</td><td>(/)F</td><td>70</td><td>F</td><td>F</td><td>102</td><td>f</td><td>(+)F</td></tr><tr><td>7</td><td>BEL</td><td>($)G</td><td>39</td><td>'</td><td>(/)G</td><td>71</td><td>G</td><td>G</td><td>103</td><td>g</td><td>(+)G</td></tr><tr><td>8</td><td>BS</td><td>($)H</td><td>40</td><td>(</td><td>(/)H</td><td>72</td><td>H</td><td>H</td><td>104</td><td>h</td><td>(+)H</td></tr><tr><td>9</td><td>HT</td><td>($)I</td><td>41</td><td>)</td><td>(/)I</td><td>73</td><td>I</td><td>I</td><td>105</td><td>i</td><td>(+)I</td></tr><tr><td>10</td><td>LF</td><td>($)J</td><td>42</td><td>*</td><td>(/)J</td><td>74</td><td>J</td><td>J</td><td>106</td><td>j</td><td>(+)J</td></tr><tr><td>11</td><td>VT</td><td>($)K</td><td>43</td><td>+</td><td>+</td><td>75</td><td>K</td><td>K</td><td>107</td><td>k</td><td>(+)K</td></tr><tr><td>12</td><td>FF</td><td>($)L</td><td>44</td><td>,</td><td>(/)L</td><td>76</td><td>L</td><td>L</td><td>108</td><td>l</td><td>(+)L</td></tr><tr><td>13</td><td>CR</td><td>($)M</td><td>45</td><td>-</td><td>-</td><td>77</td><td>M</td><td>M</td><td>109</td><td>m</td><td>(+)M</td></tr><tr><td>14</td><td>SO</td><td>($)N</td><td>46</td><td>.</td><td>.</td><td>78</td><td>N</td><td>N</td><td>110</td><td>n</td><td>(+)N</td></tr><tr><td>15</td><td>SI</td><td>($)O</td><td>47</td><td>/</td><td>/</td><td>79</td><td>O</td><td>O</td><td>111</td><td>o</td><td>(+)O</td></tr><tr><td>16</td><td>DLE</td><td>($)P</td><td>48</td><td>0</td><td>0</td><td>80</td><td>P</td><td>P</td><td>112</td><td>p</td><td>(+)P</td></tr><tr><td>17</td><td>DC1</td><td>($)Q</td><td>49</td><td>1</td><td>1</td><td>81</td><td>Q</td><td>Q</td><td>113</td><td>q</td><td>(+)Q</td></tr><tr><td>18</td><td>DC2</td><td>($)R</td><td>50</td><td>2</td><td>2</td><td>82</td><td>R</td><td>R</td><td>114</td><td>r</td><td>(+)R</td></tr><tr><td>19</td><td>DC3</td><td>($)S</td><td>51</td><td>3</td><td>3</td><td>83</td><td>S</td><td>S</td><td>115</td><td>s</td><td>(+)S</td></tr><tr><td>20</td><td>DC4</td><td>($)T</td><td>52</td><td>4</td><td>4</td><td>84</td><td>T</td><td>T</td><td>116</td><td>t</td><td>(+)T</td></tr><tr><td>21</td><td>NAK</td><td>($)U</td><td>53</td><td>5</td><td>5</td><td>85</td><td>U</td><td>U</td><td>117</td><td>u</td><td>(+)U</td></tr><tr><td>22</td><td>SYN</td><td>($)V</td><td>54</td><td>6</td><td>6</td><td>86</td><td>V</td><td>V</td><td>118</td><td>v</td><td>(+)V</td></tr><tr><td>23</td><td>ETB</td><td>($)W</td><td>55</td><td>7</td><td>7</td><td>87</td><td>W</td><td>W</td><td>119</td><td>w</td><td>(+)W</td></tr><tr><td>24</td><td>CAN</td><td>($)X</td><td>56</td><td>8</td><td>8</td><td>88</td><td>X</td><td>X</td><td>120</td><td>x</td><td>(+)X</td></tr><tr><td>25</td><td>EM</td><td>($)Y</td><td>57</td><td>9</td><td>9</td><td>89</td><td>Y</td><td>Y</td><td>121</td><td>y</td><td>(+)Y</td></tr><tr><td>26</td><td>SUB</td><td>($)Z</td><td>58</td><td>:</td><td>(/)Z</td><td>90</td><td>Z</td><td>Z</td><td>122</td><td>z</td><td>(+)Z</td></tr><tr><td>27</td><td>ESC</td><td>(%)A</td><td>59</td><td>;</td><td>(%)F</td><td>91</td><td>[</td><td>(%)K</td><td>123</td><td>{</td><td>(%)P</td></tr><tr><td>28</td><td>FS</td><td>(%)B</td><td>60</td><td><</td><td>(%)G</td><td>92</td><td>\</td><td>(%)L</td><td>124</td><td>|</td><td>(%)Q</td></tr><tr><td>29</td><td>GS</td><td>(%)C</td><td>61</td><td>=</td><td>(%)H</td><td>93</td><td>]</td><td>(%)M</td><td>125</td><td>}</td><td>(%)R</td></tr><tr><td>30</td><td>RS</td><td>(%)D</td><td>62</td><td>></td><td>(%)I</td><td>94</td><td>^</td><td>(%)N</td><td>126</td><td>~</td><td>(%)S</td></tr><tr><td>31</td><td>US</td><td>(%)E</td><td>63</td><td>?</td><td>(%)J</td><td>95</td><td>_</td><td>(%)O</td><td>127</td><td>DEL</td><td>(%)T, (%)X, (%)Y, (%)Z</td></tr></tbody></table>

<ul><li><a href="http://www.barcodeisland.com/code93.phtml">http://www.barcodeisland.com/code93.phtml</a> <a href="https://web.archive.org/web/20090225114452/http://www.barcodeisland.com/code93.phtml">Archived</a> 2009-02-25 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a> Bar code Island's description of the code.</li></ul>
<h2 id="external-links">External links</h2>
<ul><li><a href="http://morovia.com/education/symbology/code93.asp">Morovia Library Code 93 Specification</a>  This includes the checksum computation algorithm. Note that "C" is included in the computation of "K".</li>
<li><a href="https://web.archive.org/web/20071012045825/https://www.aimglobal.org/estore/ProductDetails.aspx?ProductID=20">Code 93 Technical Specification</a></li></ul>

Code 93 open-in-new

Code 93