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: Lotus 1-2-3 Version 2.x Spreadsheet Format
: IBM
: 7272
:

Lotus 1-2-3
Microsoft Excel
WordPerfect Office
OpenOffice.org
Corel Quattro Pro
ABC Amber Text Converter

Lotus 1-2-3
Microsoft Excel
OpenOffice.org

.WK1 file extension

Kasper Torbjörn