| SIC | Category | Count |
| 2241-98 | NARROW FABRIC & OTHER SMALLWARES-MILLS | 293
|
| 2711-01 | NEWSPAPERS (PUBLISHERS) | 18005
|
| 2721-03 | NEWS PUBLICATIONS-TRADE/ASSN/ETC (MFRS) | 307
|
| 2873-01 | NITROGENOUS FERTILIZERS (MFRS) | 2070
|
| 3364-01 | NONFERROUS DIE CASTINGS-EX ALUM (MFRS) | 369
|
| 3524-01 | NURSERYMEN EQUIPMENT & SUPPLIES (MFRS) | 289
|
| 4922-98 | NATURAL GAS TRANSMISSION | 260
|
| 5039-08 | NAILING MACHINERY (WHOLESALE) | 532
|
| 5072-01 | NUTS & BOLTS (WHOLESALE) | 2050
|
| 5099-12 | NAME PLATES (WHOLESALE) | 1004
|
| 5149-14 | NUTRITION CENTERS | 1715
|
| 5193-06 | NURSERIES-PLANTS REES & ETC-WHOLESALE | 4582
|
| 5261-08 | NURSERYMEN | 17396
|
| 5499-09 | NATURAL FOODS | 251
|
| 5947-07 | NOVELTIES-RETAIL | 2258
|
| 5949-04 | NEEDLEWORK & NEEDLEWORK MATERIALS-RETAIL | 2317
|
| 5999-92 | NAIL CARE PRODUCTS | 17495
|
| 7361-03 | NANNIES | 25885
|
| 7374-15 | NETWORK MARKETING | 21168
|
| 7383-01 | NEWS SERVICE | 861
|
| 7389-79 | NOTARIES-PUBLIC | 11274
|
| 7999-51 | NATURE PEAKS | 14241
|
| 8049-08 | NURSES & NURSES | 11645
|
| 8051-01 | NURSING & CONVALESCENT HOMES | 23144
|
| 8249-01 | NURSES-PRACTITIONERS | 340
|
| 8351-02 | NURSERY SCHOOLS & KINDERGARTENS | 43380
|
| 8399-98 | NON-PROFIT ORGANIZATIONS | 83383
|
| 9711-02 | NATIONAL GUARD | 3240
|