File extension	The full name of the file	Popularity
File extension 123	Lotus 1-2-3 Spreadsheet
File extension AST	Ability Spreadsheet Template
File extension AWS	Ability Spreadsheet File
File extension BKS	Microsoft Works Spreadsheet Backup File
File extension DEF	SmartWare II Data File
File extension DEX	Excel Spreadsheet
File extension DFG	Data Flask Grid File
File extension DIS	Oracle Discoverer Workbook
File extension EDX	Edraw XML FIle
File extension EDXZ	Edraw Compressed XML FIle
File extension ESS	EasySpreadsheet Spreadsheet
File extension FCS	First Choice Spreadsheet
File extension FM	FileMaker Database
File extension FODS	OpenDocument Flat XML Spreadsheet
File extension FP	FileMaker Pro Spreadsheet
File extension GSHEET	Google Drive Spreadsheet
File extension IMP	Improv Spreadsheet
File extension KS	Microsoft Works spreadsheet file
File extension MAR	Mariner Calc Spreadsheet
File extension NAM	DMAP spreadsheet file
File extension NB	Mathematica Notebook
File extension NMBTEMPLATE	Numbers Spreadsheet Template
File extension NUMBERS	Numbers Spreadsheet File
File extension NUMBERS-TEF	Numbers iCloud Document
File extension ODS	OpenDocument Spreadsheet
File extension OTS	OpenDocument Spreadsheet Template
File extension PMD	PlanMaker Spreadsheet
File extension PMV	PlanMaker Spreadsheet Template
File extension QPW	Quattro Pro Spreadsheet
File extension RDF	Report Definition File
File extension SDC	Apache OpenOffice Calc Spreadsheet
File extension STC	OpenOffice.org Calc spreadsheet template file
File extension SXC	StarOffice Calc Spreadsheet
File extension UOS	Uniform Office Spreadsheet
File extension WKI	Lotus 2 Worksheet
File extension WKS	Works Spreadsheet
File extension WKU	Lotus 1-2-3 Spreadsheet
File extension WQ1	Quattro Pro for DOS Spreadsheet File
File extension WQ2	Quattro Pro for DOS Spreadsheet File
File extension XAR	Excel Auto-Recovery File
File extension XL	Excel Spreadsheet
File extension XLR	Works Spreadsheet
File extension XLS	Excel Spreadsheet
File extension XLSB	Excel Binary Spreadsheet
File extension XLSHTML	Microsoft Excel HTML Spreadsheet
File extension XLSM	Excel Open XML Macro-Enabled Spreadsheet
File extension XLSMHTML	Microsoft Excel MIME HTML Spreadsheet
File extension XLSX	Microsoft Excel Open XML Spreadsheet
File extension XLTHTML	Microsoft Excel HTML Spreadsheet Template
File extension XLTM	Excel Open XML Macro-Enabled Spreadsheet Template
File extension XLTX	Excel Open XML Spreadsheet Template