LPO may refer to: Lipid peroxidation LPO-50, a flamethrower built by the Soviet Union Law practice optimization Landing Page Optimization Leading Petty Officer Legal Process Outsourcing Lexicographic path ordering, a well-ordering in term rewriting (computer science) Libertarian Party of Ohio Libration point orbit Licensed Post Office Limited principle of omniscience London Philharmonic Orchestra Louisiana Philharmonic Orchestra Lactoperoxidase, an antibacterial protein present in milk and saliva