| item | description | category | filter | more on... |
| OPEB | Ordinary Potential Energy Box | Edu./Physics |
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| OPEB | Other Post Employment Benefits | Business/Positions |
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| OPEB | Other Post-Employment Benefit | Business/Positions |
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| OPEB | Other Post-retirement Employee Benefit | Business/General |
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| OPEB | Other Post-retirement Employee Benefits | Business/Positions |
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