| item | description | category | filter | more on... |
| TT&C | Telemetry, Tracking, and Command | Governmental/NASA |
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| TT&C | Telemetry, Tracking, and Commanding | Governmental/Military |
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| TT&C | Tracking, Telemetry and Command | Governmental/NASA |
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| TT&C | Tracking, Telemetry and Control | Governmental/NASA |
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