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Division I, III & IX Sections 1 - 16: Materials
The menu to the right is labeled by NBS material. Clicking on the menu link will take you to examples of buttons in that section as defined in the current NBS Classification and Competition Guidelines (Blue Book). Potential labeling issues or suggested improvements should be directed to the NBS classification committee.
Links to section pages:
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Click on the links in the menu to the right to link to pages where you can
see each section plus download and print the related worksheet.