The WK1 file format is primarily associated with ‘Lotus 1-2-3’ which is a spreadsheet program developed by Lotus ( now part of IBM ). It was an application with huge popularity in the mid-1980’s which was also due to the success of the IBM pc in the business environment. The WKS file format can also be opened, converted ( save as ) and edited by Microsoft Excel.
Mime type: application/vnd.lotus-1-2-3, application/lotus123, application/x-lotus123, application/wk1, application/x-lotus123, application/x-wk1
