Easy Working Filer is a multi-purpose program which saves you time by simpliying the storage, selection and reporting of information.  You can maintain or create mailing lists, inventories, club memberships and any other type of information file you need to organize.  You can have over 10,000 records in each file.

Note - This program will only work in the VICE 3.1 emulator if you select "C64 old NTSC" model.  Not sure about newer versions of VICE.

Here's a link to the manual.