- Open Society Fund–Prague1
- Open Society Institute–Sofia1
- Organisation for Economic Co-operation and Development1
- Ozinga, James R.1
- Padfield, Peter1
- Page, James A.1
- Parker, John W.1
- Patwardhan, Anand1
- Penney, Edmund F.1
- Petkov, Krŭstʹo1
- Pinder, John1
- Pipes, Richard1
- Plaat, Henri1
- Plato1
- Polish Unit of RFE/RL Research Institute; RFE/RL RI1
- Polišenský, Josef V.1
- Popov, Stole1
- Porch, Douglas1
- Prince, Derek1
- RFE Polish Underground Publications Unit1