Cost codes for cost and specification purposes

Two organizations specifically publish information regarding cost codes for cost and specification purposes:

• The Construction Specifications Institute (CSI) publishes information about the description, categorization, naming, and numbering for construction specifications. (For more information, visit http://www.csinet.org.)
• The Associated General Contractors has adapted this numbering system for cost code categorization, which is published jointly with CSI. Ask for the AGC Cost Classification Index. (For more information, visit http://www.agc.org/ .)

You can look for more information regarding construction at these two websites, or search for the keywords "construction cost codes" on the Internet.