| SIC | C | Description | Quantity | DBG |
| 284401 | NAIL POLISH-MANUFACTURERS | 6 | 7 | |
| 2441 | NAILED & LOCK CORNER WOOD BOXES & SHOOK | 780 | 936 | |
| 244198 | NAILED/LOCK COR WOOD BOXES/SHOOK (MFRS) | 623 | 748 | |
| 513156 | NAILHEADS & NAILHEAD TRIMMING (WHOL) | 3 | 4 | |
| 503908 | NAILING MACHINERY (WHOLESALE) | 610 | 732 | |
| 505114 | NAILS & TACKS (WHOLESALE) | 194 | 233 | |
| 331507 | NAILS & TACKS-MANUFACTURERS | 26 | 31 | |
| 509912 | NAME PLATES (WHOLESALE) | 1137 | 1364 | |
| M | NAME PLATES HOLDERS | 28 | 34 | |
| 347913 | NAME PLATES-MANUFACTURERS | 91 | 109 | |
| 517225 | NAPHTHA (WHOLESALE) | 9 | 11 | |
| 809917 | NAPRAPATHS | 110 | 132 | |
| 2241 | NARROW FABRIC & OTHER SMALLWARES MILLS | 611 | 733 | |
| 224198 | NARROW FABRIC & OTHER SMALLWARES-MILLS | 319 | 383 | |
| 5 | NATIONAL | 437 | 524 | |
| 6021 | NATIONAL COMMERCIAL BANKS | 71352 | 85622 | |
| 9711 | NATIONAL SECURITY | 14386 | ||
| 97 | NATIONAL SECURITY & INTERNATL AFFAIRS | 16253 | ||
| V | NATIONWIDE INS CO | 3 | 4 | |
| V | NATIONWIDE INS CO | 16 | 19 | |
| V | NATIONWIDE INS CO | 47 | 56 | |
| V | NATIONWIDE INS CO | 1 | 1 | |
| V | NATIONWIDE INS CO | 91 | 109 | |
| V | NATIONWIDE INS CO | 185 | 222 | |
| V | NATIONWIDE INS CO | 4365 | 5238 | |
| 209909 | NATURAL FOODS-MANUFACTURERS | 12 | 14 | |
| 4924 | NATURAL GAS DISTRIBUTION | 782 | 938 | |
| 1321 | NATURAL GAS LIQUIDS | 89 | 107 | |
| 132198 | NATURAL GAS LIQUIDS | 89 | 107 | |
| 4922 | NATURAL GAS TRANSMISSION | 310 | 372 | |
| 492298 | NATURAL GAS TRANSMISSION | 295 | 354 | |
| 4923 | NATURAL GAS TRANSMISSION & DISTRIBUTION | 186 | 223 | |
| 492398 | NATURAL GAS TRANSMISSION & DISTRIBUTION | 186 | 223 | |
| 804954 | NATURAL HEALTH & EDUCATION | 6 | 7 | |
| 2022 | NATURAL PROCESSED & IMITATION CHEESE | 664 | 797 | |
| 874260 | NATURAL RESOURCES CONSULTANTS | 19 | 23 | |
| N | NATURALIZER SHOES | 488 | 586 | |
| 842202 | NATURE CENTERS | 138 | 166 | |
| I | NATURE STORES | 54 | 65 | |
| 508813 | NAUTICAL INSTRUMENTS (WHOLESALE) | 54 | 65 | |
| 871101 | NAVAL ARCHITECTS | 251 | 301 | |
| 286104 | NAVAL STORES (MANUFACTURERS) | 8 | 10 | |
| 874261 | NAVIGATION CONSULTANTS | 16 | 19 | |
| 824922 | NAVIGATION SCHOOLS | 8 | 10 | |
| N | NCR | 1 | 1 | |
| N | NEC | 648 | 778 | |
| N | NECKWEAR & SCARVES | 9 | 11 | |
| 232302 | NECKWEAR-MANUFACTURERS SUPPLIES (MFRS) | 38 | 46 | |
| 232301 | NECKWEAR-MENS-MANUFACTURERS | 180 | 216 | |
| 561108 | NECKWEAR-RETAIL | 134 | 161 | |
| 513610 | NECKWEAR-WHOLESALE | 211 | 253 | |
| 233901 | NECKWEAR-WOMENS-MANUFACTURERS | 14 | 17 | |
| 594901 | NEEDLES | 34 | 41 | |
| 229908 | NEEDLEWORK & NEEDLEWORK MATERIALS-MFRS | 59 | 71 | |
| 594904 | NEEDLEWORK & NEEDLEWORK MATERIALS-RETAIL | 2583 | 3100 | |
| 513122 | NEEDLEWORK & NEEDLEWORK MATERIALS-WHOL | 128 | 154 | |
| 234102 | NEGLIGEES-MANUFACTURERS | 8 | 10 | |
| 594730 | NEON NOVELTIES | 33 | 40 | |
| 504649 | NEON SIGNS (WHOLESALE) | 208 | 250 | |
| L | NEPHROLOGY | 2459 | 2951 | |
| 513155 | NETS & NETTINGS-WHOLESALE | 1 | 1 | |
| 594101 | NETTINGS-RETAIL | 142 | 170 | |
| 829965 | NEURO-LINGUISTIC PROGRAMMING | 1 | 1 | |
| M | NEUROLOGY | 5672 | 6806 | |
| S | NEW YORK LIFE | 32 | 38 | |
| S | NEW YORK LIFE | 11 | 13 | |
| S | NEW YORK LIFE | 212 | 254 | |
| S | NEW YORK LIFE | 1805 | 2166 | |
| 599401 | NEWS DEALERS | 1544 | 1853 | |
| 5994 | NEWS DEALERS & NEWSSTANDS | 4131 | 4957 | |
| 271102 | NEWS DEALERS-MANUFACTURERS | 6 | 7 | |
| 272103 | NEWS PUBLICATIONS-TRADE/ASSN/ETC (MFRS) | 293 | 352 | |
| 738301 | NEWS SERVICE | 901 | 1081 | |
| 7383 | NEWS SYNDICATES | 991 | 1189 | |
| 272104 | NEWSLETTERS (MANUFACTURERS) | 331 | 397 | |
| 899928 | NEWSPAPER CORRESPONDENTS | 58 | 70 | |
| 519205 | NEWSPAPER DEALERS-BACK NUMBER (WHOL) | 16 | 19 | |
| 596302 | NEWSPAPER DELIVERY | 140 | 168 | |
| 519203 | NEWSPAPER DISTRIBUTORS | 719 | 863 | |
| 738302 | NEWSPAPER FEATURE SYNDICATES | 100 | 120 | |
| 271198 | NEWSPAPER PUBLISHING & PRINTING (MFRS) | 1145 | 1374 | |
| 731309 | NEWSPAPER REPRESENTATIVES | 15 | 18 | |
| 271101 | NEWSPAPERS (PUBLISHERS) | 17096 | 20515 | |
| 2711 | NEWSPAPERS PUBLISHING & PRINTING | 18135 | 21762 | |
| 599403 | NEWSRACKS | 16 | 19 | |
| 782203 | NEWSREELS | 2 | 2 | |
| 516931 | NICKEL (WHOLESALE) | 39 | 47 | |
| 505204 | NICKEL-SILVER (WHOLESALE) | 1 | 1 | |
| 581304 | NIGHT CLUBS | 10792 | 12950 | |
| 581308 | NIGHT CLUBS INFORMATION SERVICE | 5 | 6 | |
| P | NIGHTWEAR | 7 | 8 | |
| N | NISSAN | 136 | 163 | |
| G | NISSAN | 1112 | 1334 | |
| 516950 | NITROGEN (WHOLESALE) | 41 | 49 | |
| 2873 | NITROGENOUS FERTILIZERS | 1686 | 2023 | |
| 999925 | NOISE CONTROL CONSULTANTS | 103 | ||
| 99 | NONCLASSIFIED ESTABLISHMENTS | 151641 | ||
| 9999 | NONCLASSIFIED ESTABLISHMENTS | 1 | ||
| 999977 | NONCLASSIFIED ESTABLISHMENTS | 147501 | ||
| 3297 | NONCLAY REFRACTORIES | 1079 | 1295 | |
| 329798 | NONCLAY REFRACTORIES | 169 | 203 | |
| 8733 | NONCOMMERCIAL RESEARCH ORGANIZATIONS | 3909 | 4691 | |
| 3644 | NONCURRENT-CARRYING WIRING DEVICES | 380 | 456 | |
| 364498 | NONCURRENT-CARRYING WIRING DEVICES (MFR) | 370 | 444 | |
| 6091 | NONDEPOSIT TRUST FACILITIES | 72 | 86 | |
| 609198 | NONDEPOSIT TRUST FACILITIES | 33 | 40 | |
| 61 | NONDEPOSITORY CREDIT INSTITUTIONS | 99897 | 119876 | |
| 5199 | NONDURABLE GOODS NEC | 37468 | 44962 | |
| 3364 | NONFERROUS DIE-CASTINGS-EX ALUMINUM | 319 | 383 | |
| 3463 | NONFERROUS FORGINGS | 141 | 169 | |
| 346398 | NONFERROUS FORGINGS (MANUFACTURERS) | 141 | 169 | |
| 3369 | NONFERROUS FOUNDRIES EXCEPT ALUMINUM | 1114 | 1337 | |
| 336998 | NONFERROUS FOUNDRIES-EX ALUMINUM/COPPER | 639 | 767 | |
| 3299 | NONMETALLIC MINERAL PRODUCTS NEC | 1736 | 2083 | |
| 329998 | NONMETALLIC MINERAL PRODUCTS NEC (MFRS) | 522 | 626 | |
| 148198 | NONMETALLIC MINERALS SVC-EXCEPT FUELS | 18 | 22 | |
| 1481 | NONMETALLIC MINERALS SVCS EXCEPT FUELS | 18 | 22 | |
| 839998 | NON-PROFIT ORGANIZATIONS | 85836 | 103003 | |
| 2297 | NONWOVEN FABRICS | 174 | 209 | |
| 229701 | NONWOVEN FABRICS (MANUFACTURERS) | 174 | 209 | |
| 209802 | NOODLES (MANUFACTURERS) | 164 | 197 | |
| 7 | NORTH AMERICAN | 598 | 718 | |
| 738979 | NOTARIES-PUBLIC | 11502 | 13802 | |
| 228401 | NOTIONS-MANUFACTURERS | 47 | 56 | |
| 594903 | NOTIONS-RETAIL | 108 | 130 | |
| 513120 | NOTIONS-WHOLESALE | 223 | 268 | |
| 323107 | NOVELTIES-MANUFACTURERS | 143 | 172 | |
| 594707 | NOVELTIES-RETAIL | 2094 | 2513 | |
| 519914 | NOVELTIES-WHOLESALE | 643 | 772 | |
| 507208 | NOZZLES (WHOLESALE) | 48 | 58 | |
| 874851 | NUCLEAR ENERGY CONSULTANTS | 75 | 90 | |
| 807116 | NUCLEAR ENERGY LABORATORIES | 1 | 1 | |
| 286905 | NUCLEAR FUELS (MANUFACTURERS) | 3 | 4 | |
| 344312 | NUCLEAR REACTORS-MANUFACTURERS | 5 | 6 | |
| 703204 | NUDIST PARKS | 35 | 42 | |
| 357920 | NUMBER ISSUING SYSTEMS (MANUFACTURERS) | 1 | 1 | |
| 357901 | NUMBERING MACHINES (MANUFACTURERS) | 60 | 72 | |
| 354117 | NUMERICAL CONTROL MACHINING (MFRS) | 15 | 18 | |
| 519306 | NURSERIES-PLANTS TREES & ETC-WHOLESALE | 4096 | 4915 | |
| 526108 | NURSERYMEN | 17553 | 21064 | |
| 352401 | NURSERYMEN EQUIPMENT & SUPPLIES (MFRS) | 349 | 419 | |
| 804908 | NURSES & NURSES' REGISTRIES | 13164 | 15797 | |
| 804927 | NURSES AIDS-UNLICENSED | 24 | 29 | |
| 804955 | NURSES LICENSED-ANESTHETIST | 32 | 38 | |
| 824901 | NURSES SCHOOLS | 344 | 413 | |
| 569929 | NURSES SUPPLIES | 120 | 144 | |
| 804907 | NURSES-PRACTITIONERS | 949 | 1139 | |
| 736116 | NURSES-RECRUITMENT | 4 | 5 | |
| 805101 | NURSING & CONVALESCENT HOMES | 20612 | 24734 | |
| 8059 | NURSING & PERSONAL CARE FACILITIES NEC | 28019 | 33623 | |
| 805999 | NURSING & PERSONAL CARE NEC | 47 | 56 | |
| 874874 | NURSING CONSULTANTS | 63 | 76 | |
| 504737 | NURSING HOME EQUIPMENT & SUPLS (WHOL) | 20 | 24 | |
| 832216 | NURSING HOME INFORMATION & REFERRAL | 384 | 461 | |
| 805907 | NURSING HOME SERVICES | 376 | 451 | |
| 874121 | NURSING HOMES CONSTR & MGMT CONSULTANTS | 1 | 1 | |
| 874107 | NURSING HOMES MANAGEMENT SERVICE | 253 | 304 | |
| 804952 | NURSING SERVICES | 46 | 55 | |
| E | NURSING SERVICES | 551 | 661 | |
| 352321 | NUT CRACKING & SHELLING MACHINES (MFRS) | 11 | 13 | |
| 508338 | NUT ROASTING MACHINES (WHOLESALE) | 1 | 1 | |
| 549936 | NUTRIENTS | 1 | 1 | |
| 804909 | NUTRITIONISTS | 2622 | 3146 | |
| 544102 | NUTS-EDIBLE | 1316 | 1579 | |
| 072308 | NUTS-EDIBLE-PROCESSING | 194 | 233 | |
| 514510 | NUTS-EDIBLE-WHOLESALE & PROCESSING | 250 | 300 | |
| 513125 | NYLON FABRICS (WHOLESALE) | 19 | 23 |