| item | description | category | filter | more on... |
| OER | Office of Extramural Research | Governmental/US Gov. |
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| OER | Oil Extract Rate | Business/General |
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| OER | Optical & Electronic Research | Edu./Universities |
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| OER | Optical & Electronic Research, Inc. | Business/Firms |
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| OER | Original Equipment Reproduction | Business/Firms |
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| OER | Ornskoodsvik, Sweden | Regional/Airport Codes |
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| OER | Oxygen Evolution Reaction | Edu./Chemistry |
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