| Practical Salinity Scale | Academic & Science |
| Problem for Self Study | Academic & Science |
| Petroleum Safety Specialist | Academic & Science |
| Psychological Social Sciences | Academic & Science |
| Precision System Science | Academic & Science |
| Plant and Soil Science | Academic & Science |
| Planetary Science Subcommittee | Academic & Science |
| Planetary and Space Science | Academic & Science |
| Peace Science Society | Academic & Science |
| Pharmaceutical Society of Singapore | Academic & Science |
| Personal Scheduler for Students | Academic & Science |
| Planetary Sciences Subcommittee | Academic & Science |
| Product Specification Sheet | Academic & Science |
| Posadas | Airport Code |
| Payless ShoeSource, Inc. | Business |
| Property Symbolization System | Business |
| Physician Sales and Service | Business |
| Peak Season Surcharge | Business |
| Public Sector Solutions | Business |
| PenStar Systems, L. L. C. | Business |
| Play Sound Shell | Community |
| Professional Scuba Schools | Community |
| Pyramid Spiritual Societies | Community |
| Power System Stabilizer | Computer Hardware |
| PlayStation Soldiers | Computing |
| Probabilistic Signature Scheme | Computing |
| PageSpeed Service | Computing |
| Password Self Service | Computing |
| Partner Self Service | Computing |
| Personal Security System | Computing |
| Playstation Store | Computing |
| Performance Support Systems | Computing |
| Professional Software Services | Computing |
| Primary Synchronization Signal | Computing |
| Physical Signaling Sublayer | Computing |
| Packeteer Software Subscription | Computing |
| Packet Switching System | Computing |
| Product Support Service | Computing |
| Product Service System | Computing |
| Professional Support System | Computing |
| Packet Switch Stream | Computing |
| Packet Switched Service | Computing |
| Private Integrated Services Signaling System | Computing |
| Post Script Stub | Computing |
| Private Network Signaling System | Computing |
| Process Status Structure | Computing |
| Personnel Safety System | Computing |
| Personal Subscriber Station | Computing |
| Philips Sound Solutions | Computing |
| Personal Sound Studio | Electronics |
| Periodic Spin Structure | General |
| Patient Safety Screener | General |
| Project Scope Statement | General |
| Participants Support System | General |
| Package Sub Station | General |
| Protective Security Specialists | General |
| Persistent Surveillance Systems | General |
| Physica status solidi | General |
| Professional Scientific Services | General |
| Polskie Stowarzyszenie Speedcubingu | General |
| Plankton Steals Slime | General |
| Professional Support Staff | General |
| Precision Surfacing Solutions | General |
| Poly Styrenesulfonate Scanning | General |
| PmWiki Strip Slashes | General |
| Predictive Safety Systems | General |
| Passenger Sensing System | General |
| Power Steering System | General |
| Personal Safety System | General |
| Premium Sound System | General |
| Paddle Shifter System | General |
| Photonic Service Switch | General |
| Shaft Seal | General |
| Presbyterian Senior Services | General |
| Premium Sound Solutions | General |
| Particle Sizing Systems | General |
| Preferred Systems Solutions | General |
| Poly Styrene Sulfonic | General |
| Public Sector Superannuation | General |
| Pure Surface State | General |
| Power Slope Sca | General |
| Product Support Solutions | General |
| Personal Support Specialist | General |
| Power Systems Specialists | General |
| Player Search System | General |
| Proteus shingella salmonella | General |
| Price Support Scheme | General |
| Person Shaped Support | General |
| Parent Self Serve | General |
| Plaintiffs Separate Statement | General |
| Professor Sweats Story | General |
| Post Script Script | General |
| Planetary Star Ship | General |
| Php Shared System | General |
| Procedures Specifications And Standards | General |
| Parkerized Synthetic Stock | General |
| Parallel Smaller Smaller | General |
| Posting Second Statement | General |
| Postal Service Schedule | General |
| Performance Suspension System | General |
| Professional Suspension System | General |
| Pilot Super Sport | General |
| Pneumatic Shaped Solid | General |
| Passive Safety Systems | General |
| Pre-Crash Safety System | General |
| Pattern Select Switch | General |
| Pro Supertruck Series | General |
| Passenger Service System | General |
| Pre-Active Safety Seat | General |
| Planar Suspension System | General |
| Push Button Start System | General |
| Passive Suspension System | General |
| Professional Services Schedule | General |
| Plastic Safety Systems | General |
| Progressive Safety Steering | General |
| Packet Switching Service | General |
| Primary Sync Sequence | General |
| Partner Support Service | General |
| Primary Stroke Services | General |
| Passenger Support Specialist | General |
| Product Support Sales | General |
| Professional Status Survey | General |
| Power Slope Scale | General |
| Principal Slip Surface | General |
| Pearson Safety Services | General |
| Positive Suitcase Sign | General |
| Premier Sound Services | General |
| Postgraduate Support Scheme | General |
| Professional Staff Senate | General |
| Poly Styrene Sulfonate | General |
| Patient Safety Staff | Governmental |
| Port Safety and Security | Governmental |
| Pistol Subgun Shotgun | Governmental |
| Police Sniper Special | Governmental |
| Pass Signal at Stop | Governmental |
| Product Support Services | Governmental |
| Port Security Surcharge | Governmental |
| Police Sharp Shooter | Governmental |
| PADSALI | Indian Railway Station |
| Professional Selling Skills | Jobs |
| Private School Supporter | Jobs |
| Progressive Systemic Sclerosis | Medical |
| Painful Shoulder Syndrome | Medical |
| Panic Symptom Scale | Medical |
| Patient Scheduling System | Medical |
| Performance Status Scale | Medical |
| Personal Social Services | Medical |
| Physiologic Saline Solution | Medical |
| Poisoning Severity Score | Medical |
| portosystemic shunt | Medical |
| primary Sjögren syndrome | Medical |
| Professional Stress Scale | Medical |
| Psoriasis Severity Scale | Medical |
| Psychiatric Status Schedule | Medical |
| Psychosocial Short Stature | Medical |
| PTSD Symptom Scale | Medical |
| primary Sj?ren syndrome | Medical |
| Pediatric Specialty Services | Medical |
| Penn Shoulder Score | Medical |
| Porcine Stress Syndrome | Medical |
| Perceived Stress Scale | Military and Defence |
| Pre-positioned Strategic Stocks | Military and Defence |
| Personnel Service Support | Military and Defence |
| Personnel Support System | Military and Defence |
| Personnel Support Summary | Military and Defence |
| Projected Smoke System | Military and Defence |
| Passive Sensor System | Military and Defence |
| Parallel Single-unit Spiral | Military and Defence |
| Personnel Services Support | Military and Defence |
| Physics Selection Strategy | Physics Related |
| Posadas, MI, Argentina | Regional |
| Process Server Software | Softwares |
| Pad Safety Supervisor | Space Science |
| Payload Specialist Station | Space Science |
| Payload Support System | Space Science |
| Propellant Supply Subsystem | Space Science |
| Propulsion Support System | Space Science |
| Portable Spacecraft Simulator | Space Science |
| Phone Search Space | Telecommunication |