XLS, MS Excel 97/2000/XP (.xls)
The .xls file format
Microsoft Excel is a spreadsheet package created by Microsoft and is used in Windows, Mac OS X, Android and iOS. MS Excel has capabilities such as calculation, drawing graphs and pivot tables, and programming through Visual Basic for Applications. It has taken over from Lotus 1-2-3 as the accepted standard for spreadsheets. The XLS extension in use until 2007 has now been replaced by an Open Office XML file format denoted by XML or XMLSS. Excel 2007 is backwards compatible meaning it can read DOS-based file formats.
.xls technical details
Microsoft Excel up until 2007 version used a proprietary binary file format called Binary Interchange File Format (BIFF) as its primary format. Used as the basis for XLS files it is a persistence format that supports authoring and manipulating content in workbooks and workbook templates. Most versions of Microsoft Excel can read CSV, DBF, SYLK, DIF, and other legacy formats.
Additional information about XLS file format
|File conversion||Convert a file to XLS|
|Associated programs||Microsoft Office 2007, Microsoft Office 2010, OpenOffice Calc|