Convert WK1 to XLSM

The WK1 file extension, short for Lotus Worksheet, was used by the Lotus 1-2-3 spreadsheet software developed by Lotus Development Corporation and later acquired by IBM. These files stored data in a tabular format with cells organized by rows and columns, enabling users to perform data analysis and compute formulas efficiently. Although Lotus 1-2-3 has been discontinued, WK1 files can still be opened by some versions of Microsoft Excel and other compatible software like OpenOffice Calc. However, support for WK1 files was dropped in Excel 2007 and later versions.

The XLSM file extension stands for Microsoft Excel Macro-Enabled Spreadsheet. It allows users to automate tasks via macros, enhancing productivity in complex data manipulation and repetitive operations. Introduced with Excel 2007 as part of the Office Open XML format, XLSM files support the embedding of VBA (Visual Basic for Applications) macros within spreadsheets. This format offers advanced functionalities for financial analysis, data modeling, and automation within the Microsoft Excel environment, optimizing efficiency for professional use.