System and system 32

Why do we have 2 differnt things in windows as; system and system 32? which all files differ in these things and why? Am searching on google but if someone know in advance i can utilize my time....... so don't mind answerin this :-).....
thanks in advance..

re: System and system 32

All what i got from search results is; earlier the windows was having 16-bit platform; and MS was not having that monopaly in its earlier era so he couldnt make support for all of the applications in 32-bit; co all those stuff are in system folder where as the upgraded stuff is in system 32.... But truly speking its not sounding me that good; if this is the case then MS must ne able to convert it by now... whats the exact reason behind these 2 diff. folders?