| .npp |
Art Explosion Publisher Pro Document |
| .ola |
Online Access File |
| .opd |
OmniPage Document |
| .omp |
OpenMind Windows Document |
| .oxps |
Open XML Paper Specification file |
| .oo3template |
OmniOutliner Template |
| .pct |
Picture File |
| .pdf |
Portable Document Format File |
| .pmd |
PageMaker Document |
| .pub |
Publisher Document |
| .pds |
PowerDirector Script File |
| .ppp |
CyberLink PowerProducer Project |
| .pcl |
Printer Command Language Document |
| .ptx |
Pro Tools Session File |
| .pmx |
MikuMikuDance Model File |
| .pzfx |
GraphPad Prism XML Project |
| .p65 |
PageMaker 6.5 Document |
| .pdr |
Windows Port Driver |
| .prn |
Printable File |
| .pdm |
PowerDesigner Database File |
| .pex |
Merak Peep Data File |
| .psg |
Page Segment File |
| .ppx |
Serif PagePlus Template File |
| .pfl |
PDFill Project File |