Spreadsheet
- 123 – Lotus 1-2-3
- AB2 – Abykus worksheet
- AB3 – Abykus workbook
- AWS – Ability Spreadsheet
- CLF – ThinkFree Calc
- CELL – Haansoft(Hancom) SpreadSheet software document
- CSV – Comma-Separated Values
- numbers – An Apple Numbers Spreadsheet file
- gnumeric – Gnumeric spreadsheet, a gziped XML file
- ODS – OpenDocument spreadsheet
- OTS – OpenDocument spreadsheet template
- QPW – Quattro Pro spreadsheet
- SDC – StarOffice StarCalc Spreadsheet
- SLK – SYLK (SYmbolic LinK)
- STC – OpenOffice.org XML (obsolete) Spreadsheet template
- SXC – OpenOffice.org XML (obsolete) Spreadsheet
- TAB – tab delimited columns; also TSV (Tab-Separated Values)
- TXT – tab delimited columns
- VC – Visicalc
- WK1 – Lotus 1-2-3 up to version 2.01
- WK3 – Lotus 1-2-3 version 3.0
- WK4 – Lotus 1-2-3 version 4.0
- WKS – Lotus 1-2-3
- WKS – Microsoft Works
- WQ1 – Quattro Pro DOS version
- XLK – Microsoft Excel worksheet backup
- XLS – Microsoft Excel worksheet sheet (97–2003)
- XLSB – Microsoft Excel binary workbook
- XLSM – Microsoft Excel Macro-enabled workbook
- XLSX – Office Open XML worksheet sheet
- XLR – Microsoft Works version 6.0
- XLT – Microsoft Excel worksheet template
- XLTM – Microsoft Excel Macro-enabled worksheet template
- XLW – Microsoft Excel worksheet workspace (version 4.0)
Read more about this topic: List Of File Formats