IT is concerned with the utilization of technology in processing information (meaningful data). (*)
The academic discipline computer science, also known as computing science, is the study of computation and information as well as the description, construction and use of computer systems.
A quote from Communications of the ACM [Computing as a Discipline 1989] page 12:
The discipline of computing is the systematic study of algorithmic processes that describe and transform information: their theory, analysis, design, efficiency, implementation, and application.
Informatics is often used in Europe as a synonym for computer science, for example Fakultät für Informatik - Technische Universität München (IN-TUM) was established in 1967.
(*) The concept of information cannot be made precise in the same way as computation can be defined with reference to the Turing Machine.
Jørgen Villadsen 2006-12-30 imm.dtu.dk/~jv/it