XLS files are spreadsheet files created by Microsoft Office Excel. An Excel spreadsheet can contain anything from images and plain text to graphs and tables and can be opened using Excel.

How to Read Excel Files on an iPad. The iPad has become a popular business tool for many different reasons, ranging from its ease of use to its security model to its support for business ...

A typical CSV file looks like this, where each line contains the same sequence of data so any program which needs to read it knows what to expect: Product, Size, Color, Price Shirt, Medium, Blue, $14 ...