What does UPO stand for?

UCAR Projects Office (SAUS)

Undistorted Power Output

Unidentified Paleontological Object

Union of the People of Ordino (Andorra) - Political party (PSAP)

United Partisans Organization (SAUS)

Unit Personnel Office - or Officer - Military

Unit Personnel Officer (MLEX)

Unpentoctium - Chemical element (EPT)

Unstable Periodic Orbit