| Business | Phone |
| Aimstar Information Solutions 9250 Bendix Rd, Columbia 21045 | (410) 730-4866 |
| Amerisys Information Systems 10440 Little Patuxent Pkwy, Columbia 21044 | (410) 740-5639 |
| Auxiliary Information Systems Columbia 21044 | (410) 740-8732 |
| J I L Information Systems 9160 Rumsey Rd, Columbia 21045 | (410) 964-3613 |
| Princeton Information Ltd 10480 Little Patuxent Pkwy, Columbia 21044 | (410) 740-3027 |