Cardfile

Cardfile is an application of Microsoft Windows for creating index cards (stored in the  file format).

History
Cardfile was first introduced in the Windows 1.0 Beta Release and initially released in the Windows 1.01 retail release.

Up until Windows 2.x, the file extension where cards are saved depended on the system locale. Since Windows 3.0, all locales apart from the English one use the  file extension.

Windows NT 3.51 is the last version to have Cardfile. The app is no longer present in clean installations as of Windows 95. It will remain however, when upgrading from an earlier Windows version.