What is the difference between .xlk and .ett?
- Extension
 - .xlk
 - .ett
 
- Format
 - Binary
 
- Category
 - Spreadsheet
 - Spreadsheet
 
- Developer
 - Microsoft
 - Kingsoft
 
- Description
 - XLK files are Microsoft Excel Backup Files, which are created as backup copies of Excel files (.XLS or .XLSX). They contain a copy of the excel file in its original state, and can help to restore a file if the original is lost, damaged or corrupted.
 - Kingsoft Spreadsheets ett files are template files used by Kingsoft Spreadsheets, a spreadsheet program for Windows. They are used to save styles, settings, and other data that can be reused in new documents. They contain document-specific information such as fonts, page settings, and formatting.
 
- MIME Type
 - application/vnd.ms-excel
 - application/vnd.ms-works