Computer science : Computer Science 

Computer science is the study of computers and their applications, in all aspects, as well as the mathematical structures that relate to computers and computation.

Only in the last third of the 20th century has computer science been recognized as a separate discipline and developed its own methods and terminology. It has roots in electrical engineering, mathematics and linguistics, and contains elements that are demonstratably scientific, some elements that are pure mathematics, at its practical end becomes engineering, and some people even relate it to an art.

Computer science is closely related to software engineering, information systems, and computer hardware engineering. There is considerable overlap between the topics and practitioners of these fields, though important differences exist. Software engineering emphasizes the construction of large, reliable software systems in a productive, systematic, repeatable manner. Information systems (also termed management information systems) emphasizes operations, specifically the installation, administration, and application of software and computer systems. Computer engineering emphasizes the construction of computer hardware. Computer science emphasizes the analysis and theory of the building blocks used by software engineers, Information system administrators, and computer hardware engineers.

Computer science is no more about computers than astronomy is about telescopes

- Edsger Dijkstra