| FLUT | | Services-Computer Programming, Data Processing, Etc. | 1635327 |
| FLUX | | Miscellaneous Electrical Machinery, Equipment & Supplies | 1083743 |
| FLWS | | Retail-Retail Stores, NEC | 1084869 |
| FLX | | Trucking & Courier Services (No Air) | 1858724 |
| FLXS | | Household Furniture | 37472 |
| FLY | | Guided Missiles & Space Vehicles & Parts | 1860160 |
| FLYE | | Motor Vehicles & Passenger Car Bodies | 1975940 |
| FLYW | | Services-Business Services, NEC | 1580560 |
| FLYX | | Air Transportation, Nonscheduled | 1843973 |
| FLYYQ | | Air Transportation, Scheduled | 1498710 |
| FMAO | | Savings Institution, Federally Chartered | 792966 |
| FMBH | | State Commercial Banks | 700565 |
| FMBM | | State Commercial Banks | 740806 |
| FMC | | Chemicals & Allied Products | 37785 |
| FMCB | | National Commercial Banks | 1085913 |
| FMCC | | Federal & Federally-Sponsored Credit Agencies | 1026214 |
| FMCXF | | - | 1105122 |
| FMFC | | Leather & Leather Products | 2024656 |
| FMFG | | Savings Institutions, Not Federally Chartered | 1698022 |
| FMHS | | Services-Computer Programming, Data Processing, Etc. | 1811999 |
| FMN | | - | 1199004 |
| FMNB | | State Commercial Banks | 709337 |
| FMS | | Services-Misc Health & Allied Services, NEC | 1333141 |
| FMST | | Miscellaneous Metal Ores | 1935418 |
| FMTOF | | Services-Prepackaged Software | 1888151 |
| FMX | | Bottled & Canned Soft Drinks & Carbonated Waters | 1061736 |
| FMY | | - | 1319183 |
| FN | | Telephone & Telegraph Apparatus | 1408710 |
| FNB | | National Commercial Banks | 37808 |
| FNBT | | - | 1586628 |
| FND | | Retail-Lumber & Other Building Materials Dealers | 1507079 |
| FNF | | Title Insurance | 1331875 |
| FNFI | | Savings Institution, Federally Chartered | 1065823 |
| FNGR | | Services-Prepackaged Software | 1602409 |
| FNIGY | | - | 2073638 |
| FNKO | | Games, Toys & Children's Vehicles (No Dolls & Bicycles) | 1704711 |
| FNLC | | National Commercial Banks | 765207 |
| FNMA | | Federal & Federally-Sponsored Credit Agencies | 310522 |
| FNMCF | | - | 1944955 |
| FNRN | | Savings Institution, Federally Chartered | 1114927 |
| FNV | | Gold and Silver Ores | 1456346 |
| FNWB | | Savings Institutions, Not Federally Chartered | 1556727 |
| FNWD | | Savings Institution, Federally Chartered | 919864 |
| FNXMF | | - | 1898443 |
| FOA | | Mortgage Bankers & Loan Correspondents | 1828937 |
| FOF | | - | 1375340 |
| FOFA | | Surgical & Medical Instruments & Apparatus | 1871181 |
| FOFO | | Services-Management Consulting Services | 2060083 |
| FOLD | | Pharmaceutical Preparations | 1178879 |
| FONR | | Electromedical & Electrotherapeutic Apparatus | 355019 |
