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Computer Science studies what computers can do and it consists of :1- theoretical computer Science and it consists of fundamental theory, information theory, coding theory, cryptography, logic, graph theory, computational geometry, automata theory, quantum computation, parallel programming, formal methods and data structures.
2- computer engineering : designing computers is difficult. Every single task that is run on the computer goes through the core of the computer cpu. Computer architecture is how the processor is designed to perform tasks. On top of hardware there are of many layers of software, written by programmers using many different programming languages. Silicon -&get; BIOS -&get; OS -&get; App. -&get; Browser -&get; Web App.
3- Applications : solve real world problems, solving optimization problem
This is related to boolean satisfiability AI machine learning computer vision chat bots computational Science big data IoT hacking supercomputing human computer interaction which looks at how to design computer systems to be easy and intutive to use. Visual reality telepresence robotics
And you can have a look at my blog discuss every subject in every field in computer field like computer Science, information systems, multimedia and graphics, software engineering, computer engineering and electrical engineering and why we study this subject in this computer field. www.computerbranches.com.