This search aid allows you to select one or more concept codes to add to your search query.

Locating Concept Codes

1. Enter a word or phrase in the text box.
   Booleans (AND, OR, NOT, and SAME) and wildcards (* ?) are permitted.

2. Click the Find button to go to a list of codes and headings.

3. Click the Add button to select a code from the list. The selected code is added to the text box at the bottom of the page.

4. Click OK to transfer the selected code(s) to the search page.

Browsing for Concept Codes

Click a letter to browse through a list of codes and headings alphabetically by name. This feature is useful if you do not know the exact code/heading you need in your search.

About Scope Notes

Click the View Scope Notes icon to display additional information that describes how a concept code is used and/or provide historical information about its use.

Editing Search Terms

You cannot edit or remove a selected item from the text box at the bottom of the page. You can, however, edit or remove a selected item when you return to the search page.