Computer science is the scientific and practical approach to computation and its applications. It is the systematic study of the feasibility, structure, expression, and mechanization of the methodical procedures (or algorithms) that underlie the acquisition, representation, processing, storage, communication of, and access to information, whether such information is encoded as bits in a computer memory or transcribed in genes and protein structures in a biological cell. A computer scientist specializes in the theory of computation and the design of computational systems. Its subfields can be divided into a variety of theoretical and practical disciplines. Some fields, such as computational complexity theory (which explores the fundamental properties of Computational and intractable problems) are highly abstract, while fields such as computer graphics emphasize real-world visual applications. Still other fields focus on the challenges in implementing computation. Computer Science engineering deals with design, implementation, and management of information system of both software and hardware processes.
While Information Technology deals with the use of computers and computer software to convert, store, protect process, transmit, and retrieve information, Computer Science is a scientific and practical approach to computation and its applications. The difference between Computer Science and IT is that while CSE deals with the design and development of new software and hardware parts of computer, IT aims at designing, developing, implementing and managing computer-based information systems including software applications and computer hardware. When computer and communications technologies are combined, the result is Information Technology, or ‘InfoTech’. A computer scientist specializes in the theory of computation and the design of computational systems.
You can work in database management, IT, embedded systems, Telecommunication, computer hardware & software implementation & maintenance, multimedia, web designing, gaming, and almost all other industries in this sector. It is worthwhile to note that the computer industry has witnessed such phenomenal growth in recent years that IT majors like Infosys & TCS have been the major recruiters across all other branches throughout the engineering colleges in the country.