| IPST | | Beverages | 1788230 |
| IPTNF | | - | 1680513 |
| IPW | | Retail-Building Materials, Hardware, Garden Supply | 1830072 |
| IPWR | | Semiconductors & Related Devices | 1507957 |
| IPX | | Miscellaneous Metal Ores | 1898601 |
| IQ | | Services-Video Tape Rental | 1722608 |
| IQI | | 0000 | 885125 |
| IQST | | Telephone Communications (No Radiotelephone) | 1527702 |
| IQV | | Services-Commercial Physical & Biological Research | 1478242 |
| IR | | General Industrial Machinery & Equipment | 1699150 |
| IRBT | | Household Appliances | 1159167 |
| IRD | | Pharmaceutical Preparations | 1228627 |
| IRDM | | Communications Services, NEC | 1418819 |
| IREN | | Finance Services | 1878848 |
| IRHO | | Blank Checks | 2051985 |
| IRIX | | Electromedical & Electrotherapeutic Apparatus | 1006045 |
| IRM | | Real Estate Investment Trusts | 1020569 |
| IRMD | | Surgical & Medical Instruments & Apparatus | 1325618 |
| IRME | | Electromedical & Electrotherapeutic Apparatus | 1839133 |
| IRON | | Pharmaceutical Preparations | 1816736 |
| IROQ | | Savings Institution, Federally Chartered | 1514743 |
| IRRX | | Blank Checks | 1854795 |
| IRS | | Land Subdividers & Developers (No Cemeteries) | 933267 |
| IRT | | Real Estate Investment Trusts | 1466085 |
| IRTC | | Surgical & Medical Instruments & Apparatus | 1388658 |
| IRVRF | | - | 1666782 |
| IRWD | | Pharmaceutical Preparations | 1446847 |
| ISBA | | State Commercial Banks | 842517 |
| ISCO | | Pharmaceutical Preparations | 1355790 |
| ISD | | - | 1534880 |
| ISOU | | Miscellaneous Metal Ores | 1997377 |
| ISPC | | Services-Commercial Physical & Biological Research | 1558569 |
| ISPO | | Blank Checks | 1820566 |
| ISPR | | Cigarettes | 1948455 |
| ISRG | | Orthopedic, Prosthetic & Surgical Appliances & Supplies | 1035267 |
| ISRL | | Blank Checks | 1915328 |
| ISSC | | Services-Computer Programming Services | 836690 |
| ISTKF | | - | 1678748 |
| ISTR | | State Commercial Banks | 1602658 |
| IT | | Services-Management Services | 749251 |
| ITGR | | Electromedical & Electrotherapeutic Apparatus | 1114483 |
| ITHA | | Blank Checks | 2080985 |
| ITHR | | Miscellaneous Electrical Machinery, Equipment & Supplies | 1919191 |
| ITHUF | | Agricultural Production-Crops | 1643154 |
| ITIC | | Title Insurance | 720858 |
| ITMSF | | Services-Computer Processing & Data Preparation | 1285170 |
| ITOX | | Services-Prepackaged Software | 1290658 |
| ITP | | Converted Paper & Paperboard Prods (No Contaners/Boxes) | 1358190 |
| ITRG | | Gold and Silver Ores | 1722387 |
| ITRI | | Instruments For Meas & Testing of Electricity & Elec Signals | 780571 |
