SuDoc Classification Numbers
From: https://www.bc.edu/libraries/help/howdoi/howto/sudoc.html
| SuDoc Stem | Government Agency | SuDoc Stem | Government Agency |
| A | Agriculture | JU | Judiciary |
| AE | National Archives and Records Administration | L | Labor Department |
| B | Broadcasting Board of Governors | LC | Library of Congress |
| C | Commerce Department | LR | National Labor Relations Board |
| CC | Federal Communications Commission | MS | Merit Systems Protection Board |
| CR | Civil Rights Commission | NAS | National Aeronautics and Space Administration |
| D | Defense Department | NC | National Capital Planning Commission |
| E | Energy Department | NCU | National Credit Union Administration |
| ED | Education Department | NF | National Foundation on the Arts and the Humanities |
| EP | Environmental protection Agency | NMB | National Mediation Board |
| FA | Fine Arts Commission | NS | National Science Foundation |
| FCA | Farm Credit Administration | OP | Overseas Private Investment Corporation |
| FHF | Federal Housing Financing Board | P | United States Postal Service |
| FM | Federal Mediation and Conciliation Service | PE | Peace Corps |
| FMC | Federal Maritime Commission | PM | Personnel Management Office |
| FR | Federal Reserve System Board of Governors | PR | President of the United States |
| FT | Federal Trade Commission | PREX | Executive Office of the President |
| FTZ | Foreign-Trade Zones Board | PRVP | Vice President of the United States |
| GA | Government Accountability Office | RR | Railroad Retirement Board |
| GP | Government Printing Office | S | State Department |
| GS | General Services Administration | SBA | Small Business Administration |
| HE | Health and Human Services Department | SE | Securities and Exchange Commission |
| HH | Housing and Urban Development Department | SI | Smithsonian Institution |
| HS | Homeland Security | SSA | Social Security Administration |
| I | Interior Department | T | Treasury Department |
| IC | Interstate Commerce Commission | TD | Transportation Department |
| ID | US Agency for International Development | TDA | US Trade and Development Agency |
| ITC | International Trade Commission | VA | Veterans Affairs Department |
| J | Justice Department | X and Y | Congress |
From: http://www.fdlp.gov/cataloging/856-sudoc-classification-scheme?start=1
