Find organism code used in KEGG reference pathways

In my recent blog on accessing KEGG database from R/bioconductor, I used examples from human data, which is identified as “hsa” in KEGG. One has to know the organism code to retrieve information from KEGG for that specified organism. The table below lists the first three codes used in KEGG.

eco Escherichia coli K-12 MG1655
ecj Escherichia coli K-12 W3110
ecd Escherichia coli K-12 DH10B

The first text string of 3 or 4 characters in the table are the code, followed by the organism name.

This table generated from the source code of a pathway page in KEGG, which lists organism code for the organism name table.

</pre>
<form method="get" name="selmenu"><select name="org_name"><option value="map">Reference pathway</option><option value="ko">Reference pathway (KO)</option><option value="set_cookie">-----< Set personalized menu >-----</option><option value="has.sort_alp">-----< Sort below by alphabet >-----</option><option value="eco">Escherichia coli K-12 MG1655</option><option value="ecj">Escherichia coli K-12 W3110</option><option value="ecd">Escherichia coli K-12 DH10B</option></select>
<select name="org_name">...</select>
<select name="org_name">
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