| GPL | GNU Public License |
| PR | Public Relations |
| NP | Notary Public öffentliches Notariat |
| PKC | Public Key Cryptography |
| PD | Public Domain |
| PKI | Public Key Infrastructure |
| PAX | Public Access Xanadu |
| PCO | Public Carriage Office London [GB], http://www.tfl.gov.uk/pco/ |
| PHS | Public Health Service |
| IPO | Initial public offering |
| PDN | Public Data Network |
| PDS | Public Domain Software |
| GPL | General Public License [GNU] |
| M.P.A. | Master of Public Administration Akademischer Grad |
| M.P.H. | Master of Public Health Akademischer Grad |
| M.P.M. | Master of Public Management Akademischer Grad |
| PARK | Public Access Rights Key |
| PAS | Public Announcement Service |
| OPI | Open to Public Inspection |
| PAT | Public Access Terminal |
| PAP | Public Access Profile |
| PBS | Public Broadcasting System |
| NPR | National Public Radio |
| MPL | Mozilla Public License |
| M.P.P. | Master of Public Policy Akademischer Grad |
| PAR | Public Administration Review Fachzeitschrift |
| CPA | Certified Public Accountant |
| PLoS | Public Library of Science San Francisco, http://www.plos.org |
| PNO | Public Network Operator |
| PPP | Private Public Partnership Entwicklungspartnerschaft von Staat und Wirtschaft |
| PTO | Public Transport Operator |
| PUC | Public Utility Commission |
| PWI | Public Windows Initiative |
| QPL | Q Public License [Trolltech] |
| SPI | Software in the Public Interest, Inc. |
| SPKM | Simple Public Key GSS-API Mechanism |
| C&PA | Communications & Public Affairs |
| Dr.PH | Doctor of Public Health Akademischer Grad |
| CPL | Common Public License Open-Source-Lizenz |
| CPW | Certified Public Weigher |
| PIR | Public Internet Registry |
| PKCS | Public Key Cryptography Standards |
| PIPE | Public Investment in Private Equity |
| PISS | Public Information System Specialist |
| BZPH | Berliner Zentrum Public Health |
| PLAN | Public Lands Action Network |
| PLMN | Public Land Mobile Network |
| LPPL | LaTeX Project Public License |
| PAMR | Public Access Mobile Radio |
| APC | Airborne Public Correspondence [engl.] |