| PSU | Packet Switch Unit 
| Others |
| PSU | Page Set Up
| Others |
| PSU | Palawan State University
| Others |
| PSU | Parking Space Unit
| Others |
| PSU | Parmeson Salami Uglifruit
| Others |
| PSU | Partido Socialista Unificado
| Others |
| PSU | Passenger Service Unit
| Others |
| PSU | Patch Set Update
| Others |
| PSU | Pathetic Socialist University
| Others |
| PSU | Pathogen Sequencing Unit
| Others |
| PSU | Payment Services User
| Others |
| PSU | Penn Skate University
| Others |
| PSU | Penn Spam University
| Others |
| PSU | Penn State University
| Others |
| PSU | Pennsylvania Second-rate University
| Others |
| PSU | Pennsylvania Snowflake University
| Others |
| PSU | Pennsylvania Soviet University
| Others |
| PSU | Performance Stock Units
| Others |
| PSU | Pilot System Unit
| Others |
| PSU | Pittsburg State University
| Others |
| PSU | Pizza Supply Underwriters
| Others |
| PSU | Please Shut Up
| Others |
| PSU | Plymouth State University
| Others |
| PSU | Police Standards Unit
| Others |
| PSU | Police Support Unit
| Others |
| PSU | Polotsk State University
| Others |
| PSU | PolySUlfone
| Others |
| PSU | Poorland State University
| Others |
| PSU | Pork Sausage University
| Others |
| PSU | Port Security Unit
| Others |
| PSU | Portable Storage Unit
| Others |
| PSU | Portland Socialist University
| Others |
| PSU | Portland State University
| Others |
| PSU | Power Sensor Unit
| Others |
| PSU | Power Supply Unit
| Others |
| PSU | Power Supply Units
| Others |
| PSU | Power Supply Upgrade
| Others |
| PSU | Power Switching Unit
| Others |
| PSU | Practical Salinity Unit
| Others |
| PSU | Practical Salinity Units
| Others |
| PSU | Practical Salinity Unitsthis
| Others |
| PSU | Pre Screen Unit
| Others |
| PSU | Prescribing Support Unit
| Others |
| PSU | Primary Sampling Unit
| Others |
| PSU | Primary Sampling Units
| Others |
| PSU | Prince of Songkla University
| Others |
| PSU | Prince Sultan University
| Others |
| PSU | Printer Scalable Unit
| Others |
| PSU | Professional Skaters Union
| Others |
| PSU | Program Storage Unit
| Others |
| PSU | Program Stream Unit
| Others |
| PSU | Project Support Unit
| Others |
| PSU | Prueba de Selección Universitaria
| Others |
| PSU | Public Sector Undertaking
| Business, Company, Government, Organization |
| PSU | Public Sector Undertakings
| Others |
| PSU | Public Sector Union
| Others |
| PSU | Public Sector Unit
| Others |
| PSU | Public Sector Units
| Others |
| PSU | Public Sector Utilities
| Others |
| PSU | Pupil Support Unit
| Others |
| PSU | Putussibau, Indonesia
| Others |
| PSU | Python Secret Underground
| Others |