Does anyone know what all the possible return values for the OS() function are?

I am running Windows 2000 and OS() returns "Windows 5.00"; the Hacker's Guide says Windows NT 4.0 will return "Windows NT 4.00" and Windows 95 will return "Windows 4.00" which doesn't make sense to me. Could that be a misprint?

In particular, I need to know what OS() returns for Windows 95 and Windows 98.

Thanks very much.

Stan