| aprx | Vector NTI Alignment Project |
| apt | appTranslator Project |
| AutoPlay Media Studio Template |
| apz | Autoplay Media Studio Exported Project |
| architect | SQL Power Architect Project |
| arcproj | ARRIRAW Converter Project |
| argo | ArgoUML Project |
| arh | ArheoStratigraf Project |
| Siemens ProTool Compressed Project |
| arp | Arlequin Project |
| arproj | Spark AR Studio Project |
| art42 | Bernina Explorations v1.x Project |
| art50 | Bernina Embroidery Software v5.0 Design |
| art60 | Bernina Embroidery Software v6.0 Design |
| artproj | Artifacts for Visual Studio Project |
| artx | Artisteer Project |
| as2proj | FlashDevelop Project |
| as3proj | FlashDevelop Project |
| asdvdcrtproj | Aimersoft DVD Creator Project |
| ashprj | Ashampoo Burning Studio Project |
| asmproj | Atmel Studio Assembler Project |
| asprj | Altova XMLSpy Scripting Project |
| asproj | Visual Studio Analysis Services Project |
| assembly | DNASTAR SeqMan NGen Assembly Project |
| asta | Astah Project |
| astah | Astah Project |
| asw | ACDSee Slideshow Wizard Project |
| ata | Antenna Web Design Studio Project |
| atgcproj | Genetyx ATGC Project |
| atlcb | ATLAS.ti 7 Copy Bundle |
| atlpac | ATLAS.ti 1 Transfer Bundle |
| atlproj | ATLAS.ti 8 Project Bundle |
| ato | ATO Modeler Project |
| atp | Automise Project |
| Visual Studio ACT Project |
| atpz | Automise Compressed Project |
| atsuo | Atmel Studio Project |
| atx5 | Automise 5 XML Project |
| atz3 | Automise 3 Project |
| atz4 | Automise 4 Project |
| aud | Audacity Project |
| Audacity v3 Project |
| aup | Audacity Project |
| aup3 | Audacity v3 Project |
| aurx | AutoREALM Project |
| autoplay | AutoPlay Media Studio Project |
| avenirproj | StoryMill Project |
| avp | Avid Media Composer Project |
| avrasmproj | Atmel Studio Legacy Assembler Project |
| awx | ArcIMS XML Project |
| axp | AppGini v3 Project |
| b4f | Burn4Free Project |
| bamp | Easy Button and Menu Maker Project |
| band | GarageBand Project |
| baseproj | DNA Baser Sequence Alignment Project |
| baserproj | DNA Baser Sequence Alignment Project |
| bbmodel | Blockbench Project |
| bbproject | BBEdit Project |
| bbprojectd | BBEdit Project Package |
| bcard | Business Card Composer Project |
| bcp | Bamcompile Project |
| bcpf | Bandicut Video Cutter Project |
| bcw | BusinessCards MX Project |
| bdsgroup | Borland Developer Studio Project Group |
| bdsproj | Borland Developer Studio Project |
| bfp | Quest Benchmark Factory Project |
| bhw | Blophome Published Project |
| bif | Get Backup Project |
| bifx | Get Backup Project |
| bil | RiadaBillboard Project |
| bimproject | BIM Server Project |
| bip | Blue Ink Project |
| biz | ArcSoft ShowBiz Project |
| blc | Biacore Instruments Project |
| bld | Broderbund 3D Home Architect Project |
| EnergyPRO Project |
| Envisioneer Building Project |
| ble | BIAevaluation Project |
| bls | Biacore BIAlite Project |
| bmc | Bolide Movie Creator Project |
| bmo | SIMATIC WinCC Script |
| bmpr | Balsamiq Mockups Project |
| bmte | Bome Midi Translator Pro Encrypted Project |
| bmtp | Bome Midi Translator Pro Project |
| bmv | movieFOLiO Project |
| box3d | Box Shot 3D Project |
| bp0 | SmartWare Project Backup |
| bp1 | SmartWare Project Backup |
| bp2 | SmartWare Project Backup |
| bp3 | SmartWare Project Backup |
| bp4 | SmartWare Project Backup |
| bpel | Fiorano Studio BPEL Project |
| bph | Blophome Saved Project |
| bpn | ArchiCAD Project Backup |
| bpp | BatchPhoto Project |
| Musicmatch Burner Plus Project |
| bpr | BackupXpress Project |
| Borland C++ Builder Project |
| bro | Creatacard Brochure Project |
| brt | Booria Carpet Designer Robotuft Project |
