Project file created by ConceptDraw PROJECT, a project management application; stores project schedules, resources, priorities, and tracking information; used by the program for displaying project "dashboards," which summarize key performance indicators.

ConceptDraw PROJECT files also use the .CDPX and .CDPZ extensions.

A CDP file is a project created by Sony CD Architect, an audio CD mastering and burning program. It contains project information, such as the location of source files, cuts, insertion points, edits, and project properties. CDP files do not store the actual audio, only the information necessary for creating the CD after the editing is completed.

CDP files allow you to make edits to your CD without modifying the actual source files. This means that you can experiment with the settings and edits and not have to worry about altering the audio. When you first run CD Architect, a new project is automatically created but it is not until you choose to save the project that an actual CDP file is created to store the contents of the project. Choose File → Save to save the project. CDP files are only supported by CD Architect. To open a CDP file, select File → Open.. A CDP project is automatically saved every 5 minutes by CD Architect in the .AUTOSAVE.CDP file. However, the file is deleted when CD Architect is closed. You can turn off the autosave function by unchecking the Enable autosave checkbox. NOTE: Sony CD Architect is discontinued.

File used by Trainz Simulator railroad simulation games; contains game add-on content, such as train routes, locomotive designs, and scenery; can be imported using the Content Dispatcher and Content Manager Plus tools within Trainz Simulator products; installed in the World\Dispatcher\Downloads folder of Trainz installations.

CDP files are developed by third party content providers, such as Auran, and are not part of the original game content. Several tools exist for managing CDP packages.