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- Pounds per Square Inch
- HTML code for PSI acronym definition (HTML 5):
<a href="http://www.Acronyms.net/p/psi/index/#Pounds-per-Square-Inch" style="cursor: help" onclick="if(confirm('PSI stands for Pounds per Square Inch')) return false" title="Pounds per Square Inch"><abbr>PSI</abbr></a>To try it, mouse over this: PSI