| Business | Phone |
| Act Technico 9841 Brokenland Pkwy, Columbia 21046 | (410) 309-9782 |
| Am-N-Pm Computer Svc 6397 Weatherwise Way, Columbia 21045 | (301) 596-7431 |
| Computer Nerds On Call Po Box 2116, Columbia 21045 | (410) 963-8180 |
| E Plus Technology Inc 7130 Columbia Gateway Dr, Columbia 21046 | (443) 285-4300 |
| Laserscript 6660 Dobbin Rd # J, Columbia 21045 | (410) 381-3762 |
| Lazarus Foundation 6520 Freetown Rd, Columbia 21044 | (410) 531-8485 |
| P C Solutions Of Howard Cnty 6698 Buttonhole Ct, Columbia 21044 | (410) 740-9252 |
| Snell Enterprises Inc 5550 Sterrett Pl # 105, Columbia 21044 | (301) 596-1884 |
| Sourcefire Inc 9212 Berger Rd, Columbia 21046 | (410) 290-1616 |
| Spectrum Signal 6630 Eli Whitney Dr, Columbia 21046 | (410) 872-0202 |
| Tsi Telsys Inc 7100 Columbia Gateway Dr # 150, Columbia 21046 | (410) 872-3900 |
| Wizard Computer Svc 6915 Mystic Woods Way # B, Columbia 21044 | (410) 531-3943 |