| Business | Phone |
| Best Catholic Software 1479 Dunster Ln, Potomac 20854 | (301) 762-0290 |
| Sigma Computer Technology 11005 Broad Green Dr, Potomac 20854 | (301) 983-8706 |
| Software Spectrum Inc 8604 Bunnell Dr, Potomac 20854 | (301) 299-9642 |
| Cognitive Technologies Corp 5 Sotweed Ct, Potomac 20854 | (301) 581-9652 |
| Ergo Systems Inc 11903 Enid Dr, Potomac 20854 | (301) 983-8245 |
| Geosystems 8138 Inverness Ridge Rd, Potomac 20854 | (301) 983-5424 |
| Great Game Products 7825 Tuckerman Ln # 206, Potomac 20854 | (301) 299-9005 |
| Jana Software 1412 Stratton Dr, Potomac 20854 | (301) 309-8036 |
| Karpay Associates 12116 Greenleaf Ave, Potomac 20854 | (301) 279-9430 |