| item | description | category | filter | more on... |
| PORDA | Personnel Officers of Research and Development Agencies | Governmental/Military |
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| PORDA | Personnel Officers of Research and Development Agencies | Governmental/NASA |
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| PORDA | Personnel Officers of Research and Development Agencies | Governmental/US Gov. |
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| PORDA | Personnel Officers of Research and Development Agencies | Other/Transportation |
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