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Semicolon separated value files (.skv), are just another type of specially formatted text files and as such can be imported in Microsoft Excel (.xls, .xlsx).
The program may not support it directly via File ► Open function, but you can import the data regardless and just pick which kind of separator is used to parse the data successfully.
SKV
Files with skv suffix can be typically encountered as data files saved in special Semicolon separated values file format.
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.