List of Classes Data Files
ASCII text versions of the List of Classes and related files. These files are updated twice monthly and made available on the 1st and 15th of every month.
Alphabetic listing of Government authors with corresponding SuDoc prefix.
Cumulative list of inactive item numbers that are no longer available for selection.
Cumulative list of inactive SuDoc class stems.
List of active item numbers and SuDoc class stems.
ASCII text version of the listing of publications available for selection by depository libraries.
List of Classes Online Only Items
About:
List of publications available for selection by depository libraries. Has additional fields including Sort by SuDoc, Agency, Sub-Agency, PDT List, and PDT Quantity.
File last updated:
05/15/2025
Definitions:
Formats:
E = Electronic media (unspecified)
EL = Online (Electronic Library)
MF = Microfiche
P = Paper
PDT List = Print Distribution Titles List
PDT Quantity:
20 = 20 copies are being deposited in Federal depository libraries
50 = 50 copies are being deposited in Federal depository libraries
UNL = Unlimited distribution - there are no limits to how many Federal depository libraries may select it