Computer science (English: Computer Science, sometimes abbreviated as CS) is a practical technical discipline that systematically studies the theoretical basis of information and computing and how to realize and apply it in computer systems. It is usually described as a systematic study of the algorithmic process of creating, describing and transforming information. Computer science contains many branches; Some emphasize the calculation of specific results, such as computer graphics; Some discuss the essence of computational problems, such as computational complexity theory; There are also some areas that focus on how to realize computing. For example, the theory of programming language is to study the method of describing calculation, while programming is to apply a specific programming language to solve specific calculation problems. Human-computer interaction focuses on how to make computers and calculations useful and easy to use, and be used by people anytime and anywhere.
Sometimes people mistakenly think that computer science is the cause of solving computer problems (such as information technology), or it is only related to the experience of using computers, such as playing games, surfing the Internet or word processing. In fact, computer science is concerned not only with understanding the essence of programs that realize software, such as games and browsers, but also with creating new programs or improving existing programs through existing knowledge.