StarOffice Calc Spreadsheet (.sxc)
The SXC file extension stands for StarOffice Calc Spreadsheet, a file format developed by Sun Microsystems for their StarOffice Calc software. It is used to create and edit spreadsheet documents that support formulas, functions, charts, and macros. SXC files are compatible with Apache OpenOffice Calc, and can be exported to other formats like Microsoft Excel and IBM Lotus 1-2-3. Over time, the format has been largely replaced by the OpenDocument Spreadsheet (ODS) format.