Cardfile

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File Format
Name Cardfile
Ontology
Extension(s) .crd
PRONOM fmt/1254
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.

Contents

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

Software

Sample files

Links

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