Cardfile

Cardfile (sometimes spelled CardFile or Card File) is an address book application, with a native .crd file format. It was included with Microsoft Windows 1.0 through Windows Me and Windows NT 4. It has apparently been used as a clip art format.

Reportedly, the Cardfile source code was included in some Windows SDKs.

Format details

There are three known .crd file formats, which can be named after their signatures:

• "MGC" format
• "RRG" format, used when the file contains OLE 1.0 objects
• "DKO" format, which uses Unicode text

Identification

Files begin with ASCII "MGC", "RRG", or "DKO".

Specifications

• Archived copy of Q99340: Windows 3.1 Card File Format
• Microsoft Support: Windows 3.1 Card File Format (from archive.org)
• The Cardwin Project website - Has information about the format

Software

• The Cardwin Project
• Freeware 64 bit and 32 bit CardFile replacement
• Deark can extract images and text, in most cases

Sample files

• WINDOART.ZIP [Ed. note: Somebody confused CRD format with CDR format.]
• CLIP_ART.ZIP
• WINSFT11.ZIP
• COMPUTER.CRD
• COPS.CRD
• 1a_sin.crd
• dexvert samples — document/cardfile

Links

• Wikipedia: Cardfile