After polytechnic that means diploma in engineering if you want to do further study then there are various options for you. First of all you may go for graduation in engineering B.Tech or B.E. in B.Tech you may take admission through lateral entry. In this case you will get chance to take admission directly in second year B.Tech. but in IITs there are no lateral entry seat. In other way you may appear in engineering entrance examination like a 12th pass candidates. after clearing the engineering entrance examination according to your rank through counseling you will get chance to select your college for graduation in engineering. So many students after polytechnic choose this option.
You may also go for general B.Sc study after completion of your polytechnic. You may take admission in B.Sc with honors in a good subject in which you have interest. you may also go for different professional courses like BCA, BBA etc if you wish. even after completion of your polytechnic you may also go for job. most of the engineering organization recruit polytechnic candidates. after few years experience you may go for graduation in engineering study if you wish.
you may do some computer related or your stream related training so that you can get a very good job. you may also change your stream of study into arts or commerce. you may go for graduation in language subject. you may do honors in English literature if you have interest on English language.
After completing Diploma you can apply for these following courses