You cannot get complete version information from the manual or disk labels. The only way to find out which version you have is to:

1. Drop the Help menu (Windows), Prism (or InStat) menu (Mac OS X) or Apple menu (Mac OS 8-9).
2. Choose About...
3. You'll see the full version number on the dialog.
    

These commands are standard, so work with all software.

Windows versions of GraphPad programs have two digits after the decimal place, for example Prism 4.00. Mac versions have a digit and letter after the decimal point, for example InStat 3.0b.