Computer science is the study of computational systems, algorithms, and data structures, as well as the theory and practice of creating and using software and hardware technologies. It encompasses a wide range of topics, including artificial intelligence, data science, cybersecurity, computer networks, and human-computer interaction. Computer scientists work to develop new technologies, solve complex problems, and improve the efficiency and effectiveness of computer systems. Research in computer science often involves designing and implementing new algorithms, analyzing and optimizing existing systems, and exploring the theoretical foundations of computing.