| Post Graduate Studies | Academic & Science |
| Pittsburgh Geological Society | Academic & Science |
| Pennsylvania German Society | Academic & Science |
| Purdue Geotechnical Society | Academic & Science |
| Peach Springs (az) | Airport Code |
| Professional Grading Service, Inc. - Card Grading Service | Business |
| Parking Guidance System | Business |
| Psg Solutions | Business |
| Planet Gas Ltd | Business |
| Program Global Systems Inc | Business |
| Propane | Business |
| Parkstone Grammar School | Community |
| Pate's Grammar School | Community |
| Penistone Grammar School | Community |
| Perth Grammar School | Community |
| Poole Grammar School | Community |
| Paisley Grammar School | Community |
| Portsmouth Grammar School | Community |
| Peshawar Grammar School | Community |
| Presidio Graduate School | Community |
| Pine Grove School | Community |
| Portable Gaming Solutions | Computing |
| Pro Gamer Skills | Computing |
| Pretty Good Security | Computing |
| Princeton Graphic Systems | Computing |
| Peripheral Gateways | Computing |
| Program Global Software | Computing |
| Presentation Graphics Stream | Computing |
| Partnership for Global Security | Computing |
| Peru Gaming Show | Computing |
| Manual Page (man4dos) | File Type |
| Possession Goals and Style | General |
| Projected Gauss Seidel | General |
| Planetary Gear System | General |
| Parking Guide System | General |
| Parking Guidance Solution | General |
| Passive Go System | General |
| Prandtl-Glauert Singularity | General |
| Palettes Gestion Services | General |
| Protected Geographical Status | General |
| Participatory Guarantee Systems | General |
| Precision Global Systems | General |
| Professional Growth System | General |
| Procure Goods and Services | General |
| Parallel Giant Slalom | General |
| Personal Guidance System | General |
| Procure Goods Service | General |
| Product Generation Specification | General |
| Professional Graduate Studies | General |
| Participatory Guarantee System Of India | General |
| Pressure Gauge Switch | General |
| Prompt Global Strike | General |
| Penn Global Seminars | General |
| Graphite Sheets | General |
| Petroleum Geo-Services | Governmental |
| Primorsko Goranski Savez (Croatian: Alliance of Primorje-Gorski Kotar) | International |
| Perfect Girl Syndrome | Medical |
| Physicians for Global Survival | Medical |
| Preimplantation Genetic Screening | Medical |
| Plant Genetic Systems | Medical |
| Parks Global Solution | Military and Defence |
| Primary Ground Station | Military and Defence |
| Precision Gunnery System | Military and Defence |
| Primary Gun System | Military and Defence |
| Plane Grating Spectrometer | Physics Related |
| Physics Grad Society | Physics Related |
| Peach Springs, Arizona USA | Regional |
| Preliminary Gravity Solution | Space Science |
| Power Generation Subsystem | Space Science |
| Phantom Glove Syndrome | Space Science |
| Pair Gain System | Telecommunication |
