Use the ADPICS 1100 Commodity Table Inquiry screen and type a commodity name on the first line to search for a commodity number by name.  Be sure to clear to the end of the line using the END or PAUSE keys to ensure the program doesn't read other letters from a previous search.  Pressing the F8, or NEXT, key scrolls through the Commodity Table.

If you have the first three digits of the code, you can go to Screen 5100 and enter those three digits.  From that screen, press F8 to see all the five digit codes beginning with those three digits.

Use the ADPICS 5400 Cross-Reference Menu screen to view commodities as they apply to vendors (generally Selection 1 - Commodity by Vendor).  Link to Screen 5410 and enter the vendor's federal ID number along with their mail code.  The screen will show commodity codes for which the vendor is registered.  You may have to enter more than one mail code to get this information.