DNPO

DNPO may refer to:


 * Bis(2,4-dinitrophenyl) oxalate, a chemical used in glowsticks
 * Dinitrogen pentoxide, an inorganic chemical compound
 * DNPO, the ICAO airport code for Port Harcourt International Airport
 * "Do Not Power On", acronym used in Data Center administration to warn others not to power on server machines Server (Computing). See Lockout-Tagout.