PSK may refer to:
Organisations
- Revolutionary Party of Kurdistan (PŞK), a Kurdish Separatist guerrilla group in Turkey
- Kurdistan Socialist Party (PSK), a Kurdish party in Turkey
- Phi Sigma Kappa, a fraternity
- Österreichische Postsparkasse (P.S.K.), a postal savings bank in Austria
- Post Südstadt Karlsruhe, a German sports club
Science and technology
- Phase-shift keying, a digital modulation technique
- Pre-shared key, a method to set encryption keys
- Polysaccharide-K, a protein-bound polysaccharide
Other uses
- "P.S.K. What Does It Mean?", a song by Schoolly D
- Pekerja Seks Komersial, Indonesian word for a prostitute
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