| mpo | Multi-Picture Object |
| mpp | Atari ST Multi Palette Picture |
| mps | MetaPost PostScript Output |
| mraw | Photron FASTCAM RAW Image Sequence |
| mrb | Multiple Resolution Bitmap |
| mrc | MRC Image |
| mrf | Marks Russel Format Image |
| mrsid | Multi-resolution Seamless Image Database |
| mrw | Minolta RAW Image |
| mrxs | MIRAX Virtual Slide |
| msk | BIAS Fringe Processor Image |
| Corel Paint Shop Pro Mask |
| msp | Microsoft Paint Image |
| mtiff | Multi-page TIFF Format Data |
| mtl | Alias Wavefront Material Data |
| mtv | MTV Raytracer Image |
| mtx | Maw-Ware Texture |
| mvg | Magick Vector Graphics |
| mxc3 | Magix Photo Manager Thumbnail |
| mxi | Maxwell Render Image |
| myl | MyLogoMaker Image |
| mzm | MegaZeux Image |
| nal | Entis Rasterized Image |
| naplps | North American Presentation Layer Protocol Syntax Data |
| ncr | NCR Image |
| ncy | FlashCam Frame |
| nd2 | NIS-Elements Image Sequence |
| ndpi | Hamamatsu NanoZoomer Slide |
| ndpis | Hamamatsu NanoZoomer Fluorescent Image |
| nef | Nikon RAW Image |
| neo | Neochrome Bitmap |
| nff | MTV Raytracer Image |
| ngg | Nokia Group Graphic |
| ngr | NEPLAN Graphic Data |
| nic | Nici Encrypted Image |
| niff | Navy Image File Format Bitmap |
| nitf | National Imagery Transmission Format |
| nlm | Nokia LogoManager Bitmap |
| noa | Entis Rasterized Image |
| nol | Nokia Operator Logo |
| npm | Neopaint Mask |
| npsd | NPS Image Editor Document |
| npx | FlashPix Image |
| nrw | Nikon RAW Image |
| nsl | Nokia Startup Logo |
| nso | NetStudio Easy Web Graphics Data |
| ntf | National Imagery Transmission Format |
| nvg | Nokia N8 Image |
| nwp | Magentic Wallpaper |
| oaz | OAZ Fax Image |
| oci | OpenCanvas Image |
| ocp | C64 Advanced Art Studio Image |
| oda | CALS Group 4 Type 2 Bitmap |
| odd | Amstrad CPC Perfect Pix Image |
| odg | OpenDocument Graphics Data |
| odi | OpenDocument Image |
| off | ASCII Object File Format |
| ofx | Olicom Fax Image |
| oil | Open Image Library Image |
| oir | Olympus Microscope OIR Image |
| olr | Openlab Raw Format |
| olrw | Openlab Raw Format |
| ome | Open Microscopy Environment Bitmap Image |
| omi | Orbit GIS Multiresolution Image |
| ora | MyPaint Open Raster Graphic Data |
| OpenRaster Image |
| orf | Olympus RAW Image |
| ota | Nokia OTA Bitmap |
| otb | OTA Bitmap |
| otg | OpenDocument Graphics Template |
| oti | OpenDocument Image Template |
| p | ZX81 Sinclair Basic Image |
| p11 | TRS-80 Color P11 Image |
| p2 | Pic2 Image |
| p3c | Atari ST Compressed D-GRAPH Image |
| p3d | Peak3D 3D Graphics |
| p41 | TRS-80 Color P41 Image |
| p4i | Commodore 16 Bitmap Image |
| p64 | C64 Picasso 64 Image |
| p7 | XV Visual Schnauzer Bitmap |
| pa3 | Atari ST Pablo Paint Image |
| pac | Atari Stad Compressed Bitmap |
| pai | Magix Photo Clinic Image |
| paint | MacPaint Image |
| pal | Amstrad CPC Advanced OCP Art Studio Image |
| Dr. Halo External Color Palette |
| palm | Palm OS Bitmap Image |
| pam | Portable Arbitrary Map |
| pan | SmoothMove Panorama Image |
| pano | Kodak Trophy Panoramic Image |
| pat | Corel Paint Shop Pro Pattern |
| CorelDraw Pattern |
| Gimp Pattern |
| pax | PickAx Encrypted Image |
| pbd | Adobe PhotoDeluxe Image |
| pbm | Portable Bitmap Image |
| pbma | Portable Bitmap Image |
| pbmb | Portable Bitmap Image |
| pbmv | Portable Bitmap Image |
| pbx | Atari ST QuantumPaint Image |
