| DA | DC | DD | DE | DI | DM | DO | DP | DR | DU | DV | DW | DY |
| Index entry | NAICS Code | U.S. NAICS Title |
|---|---|---|
| DDSs' (doctors of dental surgery) offices (e.g., centers, clinics) | 621210 | Offices of Dentists |
| DDT (dichlorodiphenyltrichloroethane) insecticides manufacturing | 325320 | Pesticide and Other Agricultural Chemical Manufacturing |
| DA | DC | DD | DE | DI | DM | DO | DP | DR | DU | DV | DW | DY |