CSV file open in Microsoft Excel 2016
The CSV data exchange format is supported by a large amount of personal, business, and scientific programs. Because of its wide support the format is especially useful in transferring tabular data between programs.
The file is also helpful for transferring data saved in a proprietary format, such as an .XLSX file, into another program that does not support the XLSX format. For example, you can export thousands of contacts from an email service to a CSV file then import the file into an address organizer or another email service.