| item | description | category | filter | more on... |
| TJF | Test Jack Field | Governmental/NASA |
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| TJF | Test Jack Field | Edu./Electronics |
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| TJF | The James Foundation, Baltimore, Maryland | Non-Profit Organizations |
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| TJF | The Jitsu Foundation | Radio Stations |
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| TJF | Thomas Jefferson Foundation | Non-Profit Organizations |
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