| MYE | | Plastics Products, NEC | 69488 |
| MYFW | | State Commercial Banks | 1327607 |
| MYGN | | In Vitro & In Vivo Diagnostic Substances | 899923 |
| MYI | | 0000 | 883412 |
| MYN | | 0000 | 882150 |
| MYND | | Computer Peripheral Equipment, NEC | 1708441 |
| MYNZ | | Pharmaceutical Preparations | 1874252 |
| MYO | | Orthopedic, Prosthetic & Surgical Appliances & Supplies | 1369290 |
| MYPS | | Services-Prepackaged Software | 1823878 |
| MYRG | | Water, Sewer, Pipeline, Comm & Power Line Construction | 700923 |
| MYSE | | Telegraph & Other Message Communications | 1648960 |
| MYSZ | | Services-Prepackaged Software | 1211805 |
| MZTI | | Canned, Frozen & Preservd Fruit, Veg & Food Specialties | 57515 |
| NA | | Semiconductors & Related Devices | 1872302 |
| NAAS | | Retail-Retail Stores, NEC | 1712178 |
| NABL | | Services-Prepackaged Software | 1834488 |
| NAC | | - | 1074952 |
| NAD | | - | 1083839 |
| NAGE | | Medicinal Chemicals & Botanical Products | 1386570 |
| NAII | | Medicinal Chemicals & Botanical Products | 787253 |
| NAK | | Gold and Silver Ores | 1164771 |
| NAKA | | Finance Services | 1946573 |
| NAMI | | Services-Educational Services | 1967631 |
| NAMM | | Gold and Silver Ores | 2026514 |
| NAMS | | Pharmaceutical Preparations | 1936258 |
| NAN | | - | 1074769 |
| NAOV | | Orthopedic, Prosthetic & Surgical Appliances & Supplies | 1326706 |
| NASC | | Wholesale-Drugs, Proprietaries & Druggists' Sundries | 1509957 |
| NAT | | Water Transportation | 1000177 |
| NATH | | Retail-Eating Places | 69733 |
| NATL | | Calculating & Accounting Machines (No Electronic Computers) | 1974138 |
| NATR | | Pharmaceutical Preparations | 275053 |
| NAUT | | Laboratory Analytical Instruments | 1808805 |
| NAVN | | Services-Prepackaged Software | 1639723 |
| NAZ | | - | 892992 |
| NB | | Metal Mining | 1512228 |
| NBB | | - | 1478888 |
| NBBI | | Services-Motion Picture & Video Tape Production | 1130781 |
| NBBK | | Savings Institutions, Not Federally Chartered | 1979330 |
| NBH | | - | 1178839 |
| NBHC | | National Commercial Banks | 1475841 |
| NBIS | | Services-Computer Programming, Data Processing, Etc. | 1513845 |
| NBIX | | Biological Products, (No Diagnostic Substances) | 914475 |
| NBKBY | | - | 2093618 |
| NBND | | Finance Services | 1725911 |
| NBP | | Pharmaceutical Preparations | 1778016 |
| NBR | | Drilling Oil & Gas Wells | 1163739 |
| NBRG | | Blank Checks | 1918414 |
| NBTB | | National Commercial Banks | 790359 |
| NBTX | | Pharmaceutical Preparations | 1760854 |
