| Business | Phone |
| Applied Data Systems 10260 Old Columbia Rd # G, Columbia 21046 | (301) 490-4007 |
| Broida & Associates Po Box 1247, Columbia 21044 | (410) 521-8639 |
| Computer Installation & Svc 10440 Little Patuxent Pkwy, Columbia 21044 | (410) 997-7145 |
| Computer Intelligence Assoc 8840 Stanford Blvd # 2500, Columbia 21045 | (410) 953-0100 |
| Computers R-U 10015 Old Columbia Rd, Columbia 21046 | (410) 290-6268 |
| Csi 8325 Guilford Rd, Columbia 21046 | (301) 596-4692 |
| Dakota Imaging 7130 Minstrel Way # 130, Columbia 21045 | (410) 381-3113 |
| Dallas Computer Distributors Columbia 21044 | (410) 740-5386 |
| Dimension Data 8840 Stanford Blvd # 3100, Columbia 21045 | (410) 423-5100 |
| Health Administration Systems 10270 Old Columbia Rd, Columbia 21046 | (410) 312-5280 |
| Hewlett-Packard Co 8890 Mcgaw Rd # 100, Columbia 21045 | (443) 285-4026 |
| Ian Assoc 12040 Little Patuxent Pkwy, Columbia 21044 | (410) 531-2900 |
| Logical Choice Inc 6395 Dobbin Rd, Columbia 21045 | (410) 997-6891 |
| Motorola Embedded Comms 8825 Stanford Blvd, Columbia 21045 | (410) 552-9545 |
| Open Road Technologies Inc 8805 Columbia 100 Pkwy, Columbia 21045 | (410) 740-1785 |
| Physicians Office Computer 1707 L St Nw, Columbia 21046 | (202) 466-1860 |
| Sun Microsystems Inc 6750 Alexander Bell Dr, Columbia 21046 | (410) 290-1234 |
| Tsd & J Systems Inc Columbia 21044 | (410) 992-9467 |