| Business | Phone |
| Al-Tech Assoc Inc 9251 Rumsey Rd # 1n, Columbia 21045 | (410) 418-4470 |
| Allied Electronics 7125 Thomas Edison Dr # 101, Columbia 21046 | (410) 312-0810 |
| Avnet Inc 7134 Columbia Gateway Dr, Columbia 21046 | (410) 720-3500 |
| Breville Technologies Inc 12026 White Cord Way, Columbia 21044 | (410) 740-3287 |
| Elytone Inc 6175 Commadore Ct, Columbia 21045 | (410) 740-8231 |
| Engenium Technologies Inc 8950 State Route 108, Columbia 21045 | (410) 730-2924 |
| Nu Horizon 8965 Guilford Rd, Columbia 21046 | (410) 309-4570 |
| People's Electronics Columbia 21044 | (301) 596-9612 |
| Radio Shack 10300 Little Patuxent Pkwy, Columbia 21044 | (410) 995-0085 |
| Third Wave Solutions Inc 8335 Guilford Rd # H, Columbia 21046 | (410) 290-5990 |
| Ultra Electronics Us Support Columbia 21044 | (410) 740-8077 |