The XLR file type is a spreadsheet or chart which is primarily associated with ‘Works’ by Microsoft. Microsoft Works was a simple office suite from Microsoft and is discontinued. The package consisted of a word processor, a spreadsheet and database management system. In later versions it also had a calendar application and a dictionary. Works was originally intended as a work environment in the office but later versions focused more on home use. It was discontinued when Microsoft Office 2010 was released.
MIME type : application/vnd.ms-works