Information science is the study of processes and systems that generate, preserve, transmit, receive, retrieve information. Information science includes context-specific studies on the nature of information in different settings. It also seeks to develop methods for describing, organizing, and preserving digital information effectively.
Computer science is an applied branch of mathematics focused on the design and implementation of algorithms that solve specific problems.
In practical terms, computer science is the study and implementation of computers.
Information science typically studies many different subjects in an interdisciplinary manner, including:
Computer science tends to remain focused on narrowly defined problems, such as the development of faster/better web browsers or cell phone hardware. While information scientists can be trained in any field with a significant amount of mathematical content (engineering, biology, psychology, etc.), they often seek careers involving computers and technology.