| BJRI | | Retail-Eating Places | 1013488 |
| BK | | State Commercial Banks | 1390777 |
| BKD | | Services-Nursing & Personal Care Facilities | 1332349 |
| BKE | | Retail-Family Clothing Stores | 885245 |
| BKH | | Electric Services | 1130464 |
| BKHA | | Biological Products, (No Diagnostic Substances) | 2000775 |
| BKKT | | Finance Services | 1820302 |
| BKN | | - | 894242 |
| BKNG | | Transportation Services | 1075531 |
| BKPOY | | - | 2075877 |
| BKR | | Oil & Gas Field Machinery & Equipment | 1701605 |
| BKSY | | Radio & Tv Broadcasting & Communications Equipment | 1753539 |
| BKT | | 0000 | 832327 |
| BKTH | | Miscellaneous Chemical Products | 1144392 |
| BKTI | | Radio & Tv Broadcasting & Communications Equipment | 2186 |
| BKU | | Savings Institution, Federally Chartered | 1504008 |
| BKUCF | | - | 1463978 |
| BKV | | Crude Petroleum & Natural Gas | 1838406 |
| BKYI | | Services-Prepackaged Software | 1019034 |
| BL | | Services-Prepackaged Software | 1666134 |
| BLBD | | Truck & Bus Bodies | 1589526 |
| BLBX | | Metal Mining | 1567900 |
| BLCO | | Ophthalmic Goods | 1860742 |
| BLD | | Construction - Special Trade Contractors | 1633931 |
| BLDP | | Electrical Industrial Apparatus | 1453015 |
| BLDR | | Retail-Lumber & Other Building Materials Dealers | 1316835 |
| BLE | | - | 1176194 |
| BLFS | | Electromedical & Electrotherapeutic Apparatus | 834365 |
| BLFY | | Savings Institutions, Not Federally Chartered | 1846017 |
| BLGO | | Chemicals & Allied Products | 880242 |
| BLIN | | Services-Prepackaged Software | 1378590 |
| BLIS | | Services-Advertising | 1703625 |
| BLIV | | Services-Computer Integrated Systems Design | 1982448 |
| BLK | | Security Brokers, Dealers & Flotation Companies | 2012383 |
| BLKB | | Services-Prepackaged Software | 1280058 |
| BLLN | | Services-Medical Laboratories | 2070849 |
| BLMH | | Retail-Miscellaneous Retail | 1996210 |
| BLMN | | Retail-Eating Places | 1546417 |
| BLMZ | | Services-Allied To Motion Picture Production | 1984014 |
| BLNC | | Services-Management Consulting Services | 1632121 |
| BLND | | Services-Computer Programming, Data Processing, Etc. | 1855747 |
| BLNE | | Mortgage Bankers & Loan Correspondents | 1534708 |
| BLNK | | Miscellaneous Transportation Equipment | 1429764 |
| BLPG | | Retail-Miscellaneous Retail | 1416697 |
| BLRX | | Pharmaceutical Preparations | 1498403 |
| BLSH | | Finance Services | 1872195 |
| BLTE | | Pharmaceutical Preparations | 1889109 |
| BLTH | | Mining & Quarrying of Nonmetallic Minerals (No Fuels) | 1487718 |
| BLUW | | Blank Checks | 2050501 |
| BLW | | - | 1233681 |
