| Business | Phone |
| Computer Service 821 N 27th St # C-113, Billings 59101 | (406) 259-1997 |
| Computer Technician-Systems Po Box 23714, Billings 59104 | (406) 855-0584 |
| Connecting Edge 1505 Avenue D # B, Billings 59102 | (406) 652-7681 |
| Entre Technology Svc 2727 Central Ave, Billings 59102 | (406) 256-5700 |
| Premier Technologies 3311 Central Ave, Billings 59102 | (406) 698-7459 |
| Network Information Systems Po Box 21176, Billings 59104 | (406) 670-2313 |
| M H Computer Svc 3333 2nd Ave N, Billings 59101 | (406) 869-0225 |
| Vertex Consulting Group 711 N 27th St. Suite B, Billings 59101 | (406) 545-7303 |