Cardfile

File Format
Name	Cardfile
Ontology	Electronic File Formats Address books and contacts Cardfile
Extension(s)	.crd
Released	1985

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

Links

• Wikipedia: Cardfile