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).
As you can see, the actual extension name gives clues as to the type of file it is. A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the operating system to know what type of file it is and what program to run when you double-click on it.