| Business | Phone |
| Altron Service Co Inc Columbia 21044 | (410) 730-8292 |
| Competition Plus One 10708 Bridlerein Ter, Columbia 21044 | (301) 596-0836 |
| Eagle Business Products 9689 Gerwig Ln # I, Columbia 21046 | (410) 381-8103 |
| Emc Inc 8820 Columbia 100 Pkwy, Columbia 21045 | (443) 367-5300 |
| M B Office Systems Inc 8980 State Route 108 # G, Columbia 21045 | (410) 715-0459 |
| Phoenix Data Systems Inc 5457 Twin Knolls Rd, Columbia 21045 | (301) 362-1600 |