You have been on Tamiflu for 5 days are you still contagious? My husband has a confirmed case of H1N1 and was given Tamiflu to help. It has made a marked difference in how he is feeling (he has been on the meds a little more than 24 hour â¦ s).
Worksheet file (Microsoft Excel) XLS is a file extension for a spreadsheet file format created by Microsoft for use with Microsoft Excel. XLS stands for eXceL Spreadsheet. Microsoft Excel files use a proprietary format for storing Microsoft Excel documents. This file format is known as the Binary Interchange File Format (BIFF).
File extensions are related to the file format, which is a computer programming term that specifies how information is coded for storage in a computer file. In the case of Excel, the current default file extension is XLSX and has been since Excel 2007. Prior to that, the default file extension was XLS. The difference between the two - besides the addition of the second X - is that XLSX is a XML-based open file format, while XLS is a proprietary Microsoft format.