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File Extension .123
IBM Lotus 1-2-3 Spreadsheet
Lotus 1-2-3 is a spreadsheet software that was produced by IBM until 2002. Although Lotus 1-2-3 is now obsolete, a .123 spreadsheet can still be opened by and viewed as-is or converted to a Microsoft Excel spreadsheet (.xls/.xlsx) or an Calc spreadsheet.
Free programs to use file extension .123 files:
 Icon 3.0.1 can open and print file extension .123 files
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