In computer engineering, computer organization,also called micro architecture, is the way a given instruction set architecture (ISA) is implemented on a processor. A given ISA may be implemented with different micro architectures.
In computer science and engineering, computer architecture refers to specification of the relationship between different hardware components of a computer system. It may also refer to the practical art of defining the structure and relationship of the subcomponents of a computer.
Study computer architecture and organizations:
To built faster processor. To choose a computer for a set of application in a project, to design a compiler or an operating system.
Size of components
Emphasize on Software