| cd1 | DATAIR Cafeteria Document System Data |
| cd2 | DATAIR Cafeteria Document System Custom Data |
| cda | Giza Specifier Typical Data |
| cdat | Microsoft ISA Server Cache |
| cdb | Autodesk PartMaker Cycle Database |
| CardScan Contacts Database |
| FreeOTFE Key Data |
| Giza Specifier Design Data |
| Sybase PowerDesigner Conceptual Data Model Backup |
| Symbian OS Phonebook Data |
| cdbcmsg | CIM Database CMSG Data |
| cdbk | SPSS Database |
| cdc | AutoCAD DesignCenter Preview Cache |
| Chromeleon Device Driver Configuration |
| CLAN Debug Data |
| Ovation 1 Style Sheet |
| cdcom | Circuit Diagram Compiled Components File |
| cdd | Cadifra Diagram Data |
| Chromeleon Device Driver |
| ClarisWorks ClarisDraw Data |
| cde | CADKEY Dynamic Extension |
| cded | Canadian Digital Elevation Data |
| cdf | Affymetrix Chip Description File |
| ANDI/netCDF Chromatography Data |
| CryENGINE Character Definition Data |
| ECMG Content Definition File |
| InstallShield Components Definition |
| MicroSim PCBoard Component Definition Data |
| Microsoft Channel Definition Format Data |
| netCDF Data |
| Nominal Small Business Accounting Company Data |
| Xilinx ISE Chain Description Data |
| cdf-ms | ClickOnce Compiled Manifest |
| cdfx | Cindex Data |
| cdg | CanoDraw Graph Data |
| cdi | INTEX DealMaker Output |
| cdic | ConlangDictionary Data |
| cdj | DiscJuggler CD-Rom Data |
| cdl | Common Data Form Language File |
| ConceptDraw PRO Library |
| NetCDF CDL Metadata |
| cdlx | Adobe Audition CD Layout Data |
| 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 |
| cdq | CD Indexer Data |
| cdr | Crash Data Retrieval Data |
| Final Cut Pro CD or DVD Master Image |
| TSP-INet Server CDR Data |
| cdrt | CorelDraw Shader Data |
| 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 |
| Stanford Microarray Database Clustered Data |
| ZOOM MRS-802 Album Data |
| cdv | Broken Cross Disk Manager v1 Database |
| CatDV Catalog |
| SmartWare Communications Driver |
| cdw | CADKEY Organized Dialog Data |
| cdwlxml | CDWinder License Data |
| cdws | CorelDraw X7 Workspace |
| cdx | Bentley MicroStation Cell Library Index |
| ConceptDraw PRO XML Document |
| dBASE Compound Index |
| NovaBACKUP Database Index |
| cdx3 | Cochlear Data Exchange File |
| ce | CA-Clipper Workbench Application Data |
| cea | Compressed ENVIS Archive |
| DAZ 3D Carrara Pro Exported Data |
| ced | EEGLAB Channel Data |
