| cdi | INTEX DealMaker Output |
| cdic | ConlangDictionary Data |
| cdj | DiscJuggler CD-Rom Data |
| cdl | Common Data Form Language File |
| cdl | ConceptDraw PRO Library |
| cdl | NetCDF CDL Metadata |
| cdlx | Adobe Audition CD Layout Data |
| cdlx | ConceptDraw PRO XML Library |
| cdm | Sybase PowerDesigner Conceptual Data Model |
| cdmia | Cloud Data Management Interface Capability Data |
| cdmic | Cloud Data Management Interface Container |
| cdmid | Cloud Data Management Interface Domain Data |
| cdmio | Cloud Data Management Interface Object |
| cdmiq | Cloud Data Management Interface Queue Data |
| cdmp | WCS Device Model Profile |
| cdo | Vector CAD CDO Data |
| cdoc | DigiDoc Crypted Document |
| cdr | Crash Data Retrieval Data |
| cdr | Final Cut Pro CD or DVD Master Image |
| cdr | TSP-INet Server CDR Data |
| cdrt | CorelDraw Shader Data |
| cdrt | CorelDraw Symbol Library |
| cdrw | ClarisWorks ClarisDraw Data |
| cdrx | Bosch Crash Data Retrieval Data |
| cds | TrialDirector Input Data |
| cdss | CorelDRAW Style Sheet |
| cdt | ConceptDraw PRO Template |
| cdt | Stanford Microarray Database Clustered Data |
| cdt | ZOOM MRS-802 Album Data |
| cdv | Broken Cross Disk Manager v1 Database |
