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.
An alternate, more succinct definition of computer science is the study of
automating algorithmic processes that scale. A computer scientist specializes in the theory of
computation and the design of computational systems.
Its fields 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 challenges in implementing
computation. For example, programming language theory considers various approaches to the
description of computation, while the study of computer programming itself investigates various aspects of
the use of programming language and complex
systems. Human–computer interaction considers the challenges in making
computers and computations useful, usable, and universally accessible to humans.
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