| item | description | category | filter | more on... |
| NRTC | National Radio Telecommunication Corporation | Governmental/US Gov. |
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| NRTC | National Resource and Training Center | Non-Profit Organizations |
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| NRTC | National Rotorcraft Technology Center | Governmental/Military |
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| NRTC | National Rural Telecommunications Cooperative | IT/Telecom |
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| NRTC | Nortech Forest Technology, Inc. | Business/General |
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