| 0001 | WSCAD Project |
| 0002 | WSCAD Project |
| 0003 | WSCAD Project |
| 2dr | Cadwork 2D Road Project |
| 3b | 3D-Coat Project |
| 3dmk | Autodesk 123D Make Project |
| 3dp | 3DMark 2011 Project |
| 3dp | ArtCAM Pro Project |
| 3dp | Serif 3DPlus Project |
| 3dz | Easy 3D Creator Project |
| 3mx | 3Shape Convince Project Package |
| 3pj | 3D Text Commander Project |
| 3se | 3Shape Interface Exporting Data |
| a$v | QuarkXPress Automatically Saved Project |
| a2d | AVStoDVD Project |
| a2w | Alice v2 Project |
| a3p | Alice v3 Project |
| aacx | AdminStudio Automated Application Converter Project |
| abkprj | Ashampoo Backup Project |
| accdp | Microsoft Access 2007 Project |
| acd | Sony ACID Pro Project |
| acd-bak | Sony ACID Pro Project Backup |
| acfproj | SCADAPack Workbench Project |
| ach | RSLogix 5 Project |
| acid | Sony ACID Pro Project |
| acl | Analytics Project |
| aclx | Analytics Project |
| aclx | InstallShield Analysis App Project |
| acp | ArCon Project |
| actproj | Visual Studio .NET ACT Project |
