| pigm | Indigo Packed Material Data |
| pigs | Indigo Renderer Packaged Scene |
| pik | Protel 99 Pick and Place Data |
| pike | Pike Source Code |
| pil | ETCBC PIL Data |
| ICUpilot Patient Data |
| pile | CHUM Test Results Data |
| pin | BLAST Protein Database |
| Comptons 3D World Atlas Data |
| MNS Projection Information |
| pins | Protege Instances Data |
| pipc | PIPE-FLO Compressible Database |
| piq | Piped Technology Information Query Data |
| pirs | Xbox 360 Dashboard Data |
| piv | Pivotal Sales Suite Activity Data |
| pivotlink | Microsoft Pivot Link Data |
| piw | PI ProcessBook Data |
| pix | SmartWare Physical Index |
| pixadex | CandyBar Pixadex Icon |
| pj | MKS Source Integrity Data |
| Project64 Saved State File |
| pj1 | Project64 Saved State File |
| pj2 | Project64 Saved State File |
| pjb | IBM InfoSphere Information Server Manager Data |
| pjd | Portfolio Exported Categories Data |
| pjf | iAddress Postal Job File |
| Photojunction File |
| pjl | HP Printer Job Language Data |
| ProCite Term and Journal Title List Data |
| pjn | Spectrum Projection Metadata |
| pjnz | Spectrum Projection Data |
| pjpeg | Microsoft Rights Management Protected JPEG Data |
| pjt | Photojunction Template |
| pjtf | Portable Job Ticket Format Data |
| pjv | Velocity User Selections Data |
| pjxl | HP PaintJet XL PCL Document |
| pk | Adobe Audition v3 Peak File |
| pk8 | PKCS8 Data |
| pka | Cisco Packet Tracer Activity File |
| pkb | Blackberry Password Keeper Encrypted Backup |
| pkb2 | Blackberry Password Keeper Encrypted Backup |
| pkc | Jython JAR Cache |
| pkcs12 | PKCS #12 Data File |
| pkcs7 | PKCS #7 Certificate Data |
| pkd | Eurotherm Encrypted Hydra History Data |
| Top Secret Crypto Gold Packed Data |
| pkf | Adobe Audition Peak File |
| SecretAgent Key Data |
| pkg | DataFlex Compiled Package |
| MicroSim PCBoard External Package Definition |
| P-CAD Package |
| pkgmeta | Bukkit Package Metadata |
| pkgx | Microsoft UE-V PKGX Data |
| pki | LibVirt PKI Data |
| pkj | PokerJuice Data |
| pkk | PuTTY Private Key |
| pkl | Microsoft Exchange Migration Wizard Packing List |
| Migration Wizard Packing List File |
| pklg | Wireshark Packetlogger Data |
| pkn | Microsoft SMS Package Creation Notification |
| pkp | Privacy Killer Plug-in Manager Data |
| pkpass | Apple Wallet Pass Data |
| pkr | PGP Public Keyring File |
| pks | Insight II NMR Peak Intensity Integral Data |
| STOE Powder Diffraction Peak Data |
| pksz | Cisco Packet Tracer Tutored Activity |
| pkt | Cisco Packet Tracer Network Simulation Model |
| EtherPeek Collected Packets Data |
| pku | FidoNet Batched Newsgroup Data |
| pkw | CabnetWare Package |
| pky | PockeTTY Security Certificate |
| pl | BRL-CAD 2D Plot Data |
| Fractal Zplot Palette Data |
| Harvard Graphics Palette Data |
| TeX Property List |
| pl1 | Adventure Maker Plugin |
| pl3 | Harvard Graphics ChartXL Palette Data |
| Pathloss Link Design Data |
| pl4 | Micrografx Designer 4.0 Palette |
| Pathloss Link Design Data |
