Spreadsheets - these are provided WITHOUT WARRANTY.

Right-click on the name of a file and and select "save-as" to get a copy of these files on your own computer. They were written in gnumeric, which I recommend you get. I am slowly adding EXCEL versions, using the Gnumeric "save-as Excel" function. I have no idea if they will work or not. So far, most people seem able to use them.