| PSSC | Pacific Senior Secondary Certificate 
| Others |
| PSSC | Pacific States Steel Corporation
| Others |
| PSSC | Pacific Structural Steel Conference
| Others |
| PSSC | Parallel Sysplex System Center
| Others |
| PSSC | Parent School Service Commitment
| Others |
| PSSC | Parent School Support Committee
| Others |
| PSSC | Park Student Success Center
| Others |
| PSSC | Partners for Student Success Conference
| Others |
| PSSC | Passenger Ship Safety Certificate
| Others |
| PSSC | Pastel Society of Southern California
| Others |
| PSSC | Pastel Society Southern California
| Others |
| PSSC | Penn State Snowboard Club
| Others |
| PSSC | Pennsylvania School Study Council
| Others |
| PSSC | Pennsylvania State Singing Convention
| Others |
| PSSC | Personeel Shared Service Centre
| Others |
| PSSC | Petroleum Systems Services Corporation
| Others |
| PSSC | Pharmacy Services Support Center
| Others |
| PSSC | Philadelphia Sport and Social Club
| Others |
| PSSC | Philatelic Specialists Society of Canada
| Others |
| PSSC | Philippine Social Science Council
| Others |
| PSSC | Phone Screen Sequential Capture
| Others |
| PSSC | PHP Sysadmin Script Collection
| Others |
| PSSC | Physica Status Solidi C
| Others |
| PSSC | Physical Science Study Committee
| Others |
| PSSC | Pico-Satellite Solar Cell Experiment
| Others |
| PSSC | Pittsburgh Speed Skating Club
| Others |
| PSSC | Porsche Super Sports Cup
| Others |
| PSSC | Post-Settlement Subframe Condition (BMW)
| Others |
| PSSC | Products and Solutions Support Center (IBM)
| Others |
| PSSC | Professional Services Selection Committee
| Others |
| PSSC | Progress in Solid State Chemistry
| Others |
| PSSC | Protein Structure Similarity Clustering
| Others |
| PSSC | Psychiatric Services, SC
| Others |
| PSSC | Psychology Student Study Center
| Others |
| PSSC | Psychology Student Success Center
| Others |
| PSSC | Public Service Satellite Consortium (University of Maryland)
| Others |
| PSSC | Publishers Storage and Shipping Corp
| Others |
| PSSC | Puget Sound Sailing Championship
| Others |
| PSSC | Puget Sound Skills Center
| Others |
| PSSC | Puget Sound Swim Club
| Others |
| PSSC | Punjab State Sports Council
| Others |