Difference between Computer Science, Computer Engineering and Systems and information engineering master'sdegrees
Computer Science is mainly theoretical with a heavy "cutting edge" theory and research focus. This is where you would study things like memory management, compiler design, programming language design, artificial intelligence, etc.

Computer Engineering is mainly hardware focused and is usually a subset of electronic engineering. This is where you learn to design processors and build hardware devices.

Systems and Information Engineering is like Computer Science, but is more "practically" focused - it is more about application to real-world problems, with a focus on information systems. This is where Security often falls, as well as other fields like human-computer interaction, information systems, and other applications that are closer to the user.