| AA | Aluminum Association |
| AB | Assigned by Buyer |
| AC | American Conference of Government Industrial Hygienists (ACGIH) |
| AI | Automotive Industry Action Group |
| AP | American Petroleum Institute |
| AS | Assigned by Seller |
| AT | American Society for Testing and Materials (ASTM) |
| AX | ANSI Accredited Standards Committee, X12. |
| BF | National Business Forms Association |
| BI | Book Industry Systems Advisory Committee |
| CA | Chemical Abstract Services (CAS) |
| CB | Copper and Brass Fabricators Council, Inc. |
| CC | National Cotton Council of America |
| CI | Chemical Industry Data Exchange (CIDX) |
| CM | Carbide Manufacturers |
| CR | Commander - Rome Air Development Center |
| DD | Department of Defense |
| DE | Drug Enforcement Administration |
| DO | United States Department of Transportation (DOT) |
| DR | National Wholesale Druggists Association |
| EI | Electronic Industries Association |
| EP | United States Environmental Protection Agency (EPA) |
| EU | Electric Utilities |
| EX | Electronics Industry Data Exchange (EIDX) |
| FA | Fabric and Supplier Linkage Council (FASLINC) |
| FD | Uniform Code Council (UCS) |
| GC | Graphics Communications Association |
| GU | Natural Gas Utilities |
| HI | Health Insurance Association of America |
| IA | International Agency for Research on Cancer (IARC) |
| IS | International Standards Organization |
| LI | Leasing Industry |
| MC | Manufacturing Company |
| MP | Material Safety Data Sheet (MSDS) Provider |
| MS | Military Standard |
| NE | EDX |
| NF | National Fire Protection Agency (NFPA) |
| NI | National Institute of Occupational Safety and Health (NIOSH) |
| NR | National Retail Merchants Association |
| NT | National Toxicology Program (NTP) |
| OP | Office Products |
| OS | United States Occupational Safety and Health Administration (OSHA) |
| PA | American Paper Institute |
| ST | American Iron & Steel Institute |
| TD | Transportation Data Coordinating Committee: Electronic Data Interchange Association (TDCC:EDIA) |
| TI | Telecommunications Industry |
| TM | American Textile Manufacturers Institute |
| TX | American Apparel Manufacturers Association |
| UN | United Nations (UN) |
| VI | Voluntary Interindustry Communication Standards (VICS) |
| ZZ | Mutually Defined |