ODS
OpenDocument Spreadsheet (ODS) is an open standard file format for spreadsheets. It's part of the OpenDocument Format (ODF) family, developed by the Organization for the Advancement of Structured Information Standards (OASIS). Many office suites support it, including LibreOffice and Apache OpenOffice.
ODS files can have multiple sheets, and each sheet can contain multiple rows and columns of data. The format supports a wide range of features including formulas, styles, charts, and macros.
One of the main advantages of ODS is its open nature, which ensures long-term accessibility and interoperability. It uses a compressed XML format, making it both efficient in storage and easy to process programmatically.