Computer science deals with the theoretical foundations of information and computation, and with practical techniques for their implementation and application.
or
computing science (abbreviated
CS) is the study of the theoretical foundations of
information and
computation and of practical techniques for their implementation and application in
computer systems.
[1][2] Computer scientists invent
algorithmic processes that create, describe, and transform information and formulate suitable
abstractions to model complex systems.
Computer science has many
sub-fields; some, such as
computational complexity theory, study the properties of
computational problems, while others, such as
computer graphics, emphasize the computation of specific results. Still others focus on the challenges in implementing computations. For example,
programming language theory studies approaches to describe computations, while
computer programming applies specific
programming languages to solve specific computational problems, and
human-computer interaction focuses on the challenges in making computers and computations useful, usable, and universally accessible to
humans.
The general public sometimes confuses computer science with careers that deal with computers (such as
information technology), or think that it relates to their own experience of computers, which typically involves activities such as gaming, web-browsing, and word-processing. However, the focus of computer science is more on understanding the properties of the programs used to implement software such as games and web-browsers, and using that understanding to create new programs or improve existing ones
