We have found 3 software records in our database eligible for .xls to .wk4 file format conversion.
Some programs still support the old WK4 format from Lotus 1-2-3 and can even save the data to this format from modern source files, like the XLS format from Microsoft Excel. Most likely only the data will be exported during the xls to wk4 conversion (re-save really) and no formatting will be preserved.
Updated: March 24, 2020
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.
WK4
A wk4 file extension is related to the Lotus 1-2-3 spreadsheet editing software, developed by IBM. A wk4 file stores spreadsheet document.
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