| Abbreviation | Description |
| PDRY | People's Democratic Republic of Yemen [Yemen (Aden) or South Yemen]; used for information dated before 22 May 1990 or CY91 |
| PFP | Partnership for Peace |
| PIF | Pacific Islands Forum |
| PPP | purchasing power parity |
| Ramsar | see Wetlands |
| RG | Rio Group |
| SAARC | South Asian Association for Regional Cooperation |
| SACEP | South Asia Co-opeative Environment Programme |
| SACU | Southern African Customs Union |
| SADC | Southern African Development Community |
| SAFE | South African Far East Cable |
| SCO | Shanghai Cooperation Organization |
| SECI | Southeast European Cooperative Initiative |
| SFRY | Socialist Federal Republic of Yugoslavia |
| SHF | super-high-frequency |
| Ship Pollution | Protocol of 1978 Relating to the International Convention for the Prevention of Pollution From Ships, 1973 (MARPOL) |
| Sparteca | South Pacific Regional Trade and Economic Cooperation Agreement |
| SPC | Secretariat of the Pacific Communities |
| SPF | South Pacific Forum |
| sq km | square kilometer |
| sq mi | square mile |
| TAT | Trans-Atlantic Telephone |
| Tropical Timber 83 | International Tropical Timber Agreement, 1983 |
| Tropical Timber 94 | International Tropical Timber Agreement, 1994 |
| UAE | United Arab Emirates |