gr8usr is right. I am too an IT student currently in the last year. IT is basically more focussed on softwares and applications, Operating Systems, Compilers, study of Simulation and modelling, algorithms, prob and stats and not to forget some amount of business management. thts wat makes IT ..... an IT. (however u will study basics of hardware and also microprocessors like 8085 and 8051 and also the assembly languages)
On the other hand, Computer science or Computer engineering deals majorly with hardware. tht means more of microprocessors and RAM and hard disk and all... a little more technical...
now u choose ur field... best of luck buddy