File Formats
| Filename extension | .xls, (.xlsx, .xlsm, .xlsb - Excel 2007) |
|---|---|
| Internet media type | application/vnd.ms-excel |
| Uniform Type Identifier | com.microsoft.excel.xls |
| Developed by | Microsoft |
| Type of format | Spreadsheet |
Microsoft Excel up until 2007 version used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML-based format called "XML Spreadsheet" ("XMLSS"), first introduced in Excel 2002.
Although supporting and encouraging the use of new XML-based formats as replacements, Excel 2007 remained backwards-compatible with the traditional, binary formats. In addition, most versions of Microsoft Excel can read CSV, DBF, SYLK, DIF, and other legacy formats. Support for some older file formats was removed in Excel 2007. The file formats were mainly from DOS-based programs.
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