What is I.S.?

I.S= Intergrated Science. It is a subject that combine many science in the subject.
Another subject about science is combined Science. It is a subject the combine I.S and another diffcult kind of science.

2007-09-22 16:45:37 補充：
I.S= Intergrated Science which included some easy Physics, Chemistry and Biology

I.S. is Intergrated Science, which includes Physics, Chemistry and Biology.

Phy,Chem,Bio