| HUM | | Hospital & Medical Service Plans | 49071 |
| HUMA | | Biological Products, (No Diagnostic Substances) | 1818382 |
| HUN | | Chemicals & Allied Products | 1307954 |
| HURA | | Pharmaceutical Preparations | 1498382 |
| HURC | | Industrial Instruments For Measurement, Display, and Control | 315374 |
| HURN | | Services-Management Consulting Services | 1289848 |
| HUSA | | Crude Petroleum & Natural Gas | 1156041 |
| HUT | | Finance Services | 1964789 |
| HUYA | | Services-Computer Programming, Data Processing, Etc. | 1728190 |
| HVGDF | | - | 921968 |
| HVII | | Electric Services | 1846416 |
| HVMC | | Blank Checks | 2070602 |
| HVT | | Retail-Furniture Stores | 216085 |
| HWAIF | | - | 1999124 |
| HWAUF | | - | 1817161 |
| HWBK | | National Commercial Banks | 893847 |
| HWC | | State Commercial Banks | 750577 |
| HWEP | | Motor Vehicles & Passenger Car Bodies | 1980262 |
| HWH | | Wholesale-Drugs, Proprietaries & Druggists' Sundries | 1897245 |
| HWKE | | Photographic Equipment & Supplies | 1750777 |
| HWKN | | Wholesale-Chemicals & Allied Products | 46250 |
| HWM | | Rolling Drawing & Extruding of Nonferrous Metals | 4281 |
| HWNI | | Telephone Communications (No Radiotelephone) | 1413891 |
| HXHX | | Trucking & Courier Services (No Air) | 1936817 |
| HXL | | Plastic Materials, Synth Resins & Nonvulcan Elastomers | 717605 |
| HY | | Industrial Trucks, Tractors, Trailors & Stackers | 1173514 |
| HYAC | | Blank Checks | 1970509 |
| HYDTF | | - | 1958389 |
| HYEX | | Medicinal Chemicals & Botanical Products | 1630176 |
| HYFM | | Wholesale-Miscellaneous Nondurable Goods | 1695295 |
| HYFT | | Pharmaceutical Preparations | 1715925 |
| HYI | | - | 1497186 |
| HYLN | | Truck & Bus Bodies | 1759631 |
| HYMC | | Gold and Silver Ores | 1718405 |
| HYNE | | Savings Institutions, Not Federally Chartered | 2073153 |
| HYOR | | Services-Engineering Services | 1070789 |
| HYPD | | Pharmaceutical Preparations | 1682639 |
| HYPMY | | - | 1486749 |
| HYPR | | Electromedical & Electrotherapeutic Apparatus | 1833769 |
| HYSR | | Semiconductors & Related Devices | 1481028 |
| HYT | | - | 1222401 |
| HZEN | | Commodity Contracts Brokers & Dealers | 1748945 |
| HZO | | Retail-Auto & Home Supply Stores | 1057060 |
| IAC | | Services-Computer Programming, Data Processing, Etc. | 1800227 |
| IAE | | - | 1385632 |
| IAF | | 0000 | 779336 |
| IAG | | Gold and Silver Ores | 1203464 |
| IART | | Surgical & Medical Instruments & Apparatus | 917520 |
| IAS | | Services-Computer Programming, Data Processing, Etc. | 1842718 |
| IAU | | Commodity Contracts Brokers & Dealers | 1278680 |