| Business | Phone |
| William Wanatosky Olney 20832 | (301) 570-2559 |
| Version One Software Group Inc 4112 Horatio Ct, Olney 20832 | (301) 570-2861 |
| Sim Electronics 1903 Bishops Castle Dr, Olney 20832 | (301) 774-5714 |
| Compubase Inc 18812 Clover Hill Ln, Olney 20832 | (301) 774-2516 |
| Information Resources Mgmt Olney 20832 | (301) 924-1803 |