hi,

In computer science or IT technology domain OS refers as operating system, it is an mandatory platform or knowledge you have to learn to become a  software professional. mainly software engineers works involves, programming, data management, web development etc. since you are interested for research and analytics it would be best to choose b.tech in computer science engineering. cse syllabus is more precise than IT and have further higher study streams to choose. however you must learn about latest technology apart from your college or university syllabus to pursue your long term goal.

hope it would help.