Apache OpenOffice Launch OpenOffice and press "Ctrl-O." Select the "XLS" file using the integrated file browser. Click "Open" to open the XLS in OpenOffice.

Launch OpenOffice, click "File" and choose "Open" from the menu to display the Open window. Select the CSV file and click "Open" to display the Text Import window.

CSV files are special text files that are quite common when dealing with spreadsheets. Here's how to open and make them.