Microsoft Excel Workspace (.xlw)
The XLW file extension stands for Microsoft Excel Workspace, a format used by Microsoft Excel to save the screen locations of multiple open workbooks, allowing users to restore their layout upon reopening. Introduced in earlier versions of Excel, this feature was discontinued from Excel 2013 onwards, though existing XLW files can still be opened. The primary use of XLW files was to enhance productivity by maintaining an organized workspace with multiple workbooks.