| item | description | category | filter | more on... |
| PSIA | Penn State Investment Association | Business/Prof. Org. |
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| psia | Pounds Per Square Inch Absolute | Governmental/NASA |
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| PSIA | Pounds Per Square Inch, Absolute | Misc/Unit Measures |
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| PSIA | Pressure Absolute | Other/Transportation |
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| PSIA | Private Schools Interscholastic Association | Business/Prof. Org. |
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