| nrtc.org | National Rural Telecommunications Cooperative (NRTC) |
| maccnet.com | Telecom Billing And Customer Care - Mid America Computer Corp. |
| usta.org | United States Telephone Association |
| tiaonline.org | Telecommunications Industry Association (TIA) |
| opastco.org | OPASTCO.org |
| doc.gov | National Telecommunications and Information Administration |
| ntca.org | National Telephone Cooperative Association (NTCA) |
| natoa.org | NATOA |
| naruc.org | National Association of Regulatory Commissioners (NARUC) |
| narte.org | The National Association of Radio and Telecommunications Engineers (NARTE) |
| doc.gov | www.ntia.doc.gov/ |
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