Communication systems refer to the network of devices and technologies that allow people to exchange information and messages with one another. This includes both traditional forms of communication, such as telephones and televisions, as well as newer technologies like the internet and social media platforms. Research in communication systems focuses on improving the speed, reliability, and efficiency of transferring information between individuals or groups. This can involve studying different types of communication networks, protocols, and algorithms, as well as investigating how human behaviors and interactions influence the effectiveness of communication systems. Overall, the goal of research in communication systems is to develop new technologies and strategies that enhance the way people connect and communicate with one another in today's digital age.