Linux or Windows?



Dear all,

I have a little problem and I am sure someone here will give me back a rapid 
and accurate solution :-)

Is it possible to know from within Maxima on which operating system is it 
running?

I am writing a package in Maxima code with some calls to Gnuplot. But I need 
Maxima to know how to call Gnuplot:

system("wgnuplot maxout.gnuplot") /*windows*/
or
system("gnuplot maxout.gnuplot") /*linux*/

The package is intended to be used by my pupils, but some of them (sorry :-( , 
most of them) run Maxima on Windows.

Thank you in advance.

Mario.