No matter if notebook, smartphone, washing machine, Wikipedia or Facebook: Information technology systems have become an indispensable part of their everyday lives, their working lives and their leisure time.
In addition to the hardware, it's all about the software, i.e. the programs, apps, user interfaces, etc. that bring the hardware to life.
Computer science is the science that deals with the development and application of these systems on the basis of the analysis of problems from the most diverse fields of application.