Psi 3 topics · 3 sources ScienceEnergyPounds of pressure per square inch.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite Science› EnergyRenewable EnergyPounds force of pressure per square inch.Oregon Dept of Energy — ODOE Glossary of Energy Terms retrieved 2014-06-15 Cite TechnologyDefensePounds per Square Inch.DoD Missile Defense Agency — MDA Glossary Cite