What is the difference between b.e cse and b.tech cs and difference between cse,it and software engineering

Difference in course and core areas: CSE: Computer Science engineering students study about design, implementation, and management of information system of both software and hardware processes. Students pursuing computer science study: Algorithms and Data Structure, Architecture, Artificial Intelli

To be clear with CS and IT, I would suggest you to read this article: http://online.king.edu/information-technology/difference-between-a-computer-science-information-technology-degree/