| Business | Phone |
| Adams Communication & Engineer 3460 Old Washington Rd # 102, Waldorf 20602 | (301) 893-3633 |
| Brook-Anthony Corp 8807 Dement Ct, Waldorf 20603 | (301) 843-1186 |
| Computex 376 Trefoil Pl, Waldorf 20601 | (301) 705-7686 |
| Mc Cafferty Information System 8641 Shannon Dr, Waldorf 20603 | (301) 932-8541 |
| Michael A Gibson 1282 Smallwood Dr W # 129, Waldorf 20603 | (301) 638-4480 |
| Micro-Support 302 Garner Ave, Waldorf 20602 | (301) 843-8234 |
| Nu-Pulse Technologies Inc 21 Industrial Park Dr, Waldorf 20602 | (301) 374-2534 |
| Powertek Corp 11706 Hazeltine Ct, Waldorf 20602 | (301) 885-0240 |
| Timbuktu Arabian Horse Farm 5745 Cues Favorite Pl, Waldorf 20602 | (301) 753-1865 |