The classification is not dependant on ur education level but rather on what you need it for.
You being a poor student , want to buy something for playing GTA 4 and want to make ur investment worth? that is crazy enough.
No offence but all you need is a simple core i3 proccy with 4gb ram and 320 gb hard disk should do fine. consider the toshiba c850 for around 24k , its good for programming and battery is decent too ~ 3 hrs.
I dont think it can play GTA 4 though . Dont spend much on a laptop only for programing or gaming, get a desktop instead , for the same cost u get better hardware.
Really man..... you can't get the portability of laptop from a desktop. You can take laptop with you in a bag. Moreover its better to keep laptop in hostel than a desktop.
For a college student, get a laptop with a graphics card, because you will definitely play games in your laptop, being an engg student
Lenovo Essential G500 (59-380754) Laptop (3rd Gen Ci3/ 4GB/ 500GB/ DOS/ 2GB Graph) vs Lenovo Essential G510 (59-398411) Laptop (4th Gen Ci3/ 2GB/ 500GB/ DOS/ 2GB Graph) vs Lenovo Essential G505s (59-379987) Laptop (APU Quad Core A8/ 4GB/ 1TB/ Win8/ 2
If u can't increase your budget much. try to get Lenovo G510(2nd option). If u can increase the budget, get the HP one.
Note: These are the best options for you considering your budget. Try to get one from the list