- PPAP (Pregnant Parenting Adolescent Program)
- PPARC ((organization) Particle Physics and Astronomy Research Council, a major government-sponsored science agency in the United Kingdom, merged into the Science and Technology Facilities Council in 2007)
- PPASC ((U.S.) Plans and Program Analysis Support Center)
- PPASSCCATAG ("Proud Parents Against Singles, Seniors, Childless Couples And Teens And Gays", a fictional group formed by Marge Simpson)
- PPAT (Permanency Planning Action Team Meeting)
- PPB (Public Procurement Board)
- PPBA (Pacific Palisades Baseball Association)
- PPBE (Planning, Programming, Budgeting, and Execution)
- PPBERS (Program Performance and Budget Execution Review System)
- PPBES (Planning, Programming, Budgeting, and Execution System)
- PPBS (Preschool Play Behaviour Scale)
- PPC (Power Personal Computer)
- p.p.c. (to take leave [Fr. pour prendre congé])
- PPC4I (Power Projection Command, Control, Communications, and Computers Infrastructure)
- PPCC (Provisioning Production Contract Code)
- ppcf (Pounds Per Cubic Foot)
- PPCLI (Princess Patricia's Canadian Light Infantry (regiment))
- PPCT (Planning and Programming Control Techniques)
- PPD (Personal And Professional Development)
