ODS is a spreadsheet file extension that is based on open source XML. Although it is primarily associated with Open Office and Star Office, it is a universal spreadsheet format that can be used in both Open source spreadsheets and Microsoft Excel. The spreadsheet can contain data on columns and rows.
XLSX is a proprietary spreadsheet file of Microsoft Excel that contains data. It contains data in rows or columns as well as charts. XLSX supports several mathematical functions also. It uses Open XML standard for containing data. It supports MS Office 2007 and above versions.
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