In OOTB CRM Account entity, the industry code is called industrycode. This is not an entity but an attribute.
Dynamics Online CRM 2011 >Settings->Customization->Customizations->Customize the System->Account->Fields
Look for the field industrycode. Check screenshot below

Click on Edit after selecting the attribute

HTH
Sam
Dynamics CRM MVP |
Inogic | http://inogic.blogspot.com|
news at inogic dot com
If this post answers your question, please click "Mark As Answer" on the post and "Mark as Helpful"