Explain the types of computer architecture

Computer architecture can be divided into three main categories:

Instruction Set Architecture, or ISA, is the image of a computing system that is seen by a machine language programmer. It contains the instruction set, word size, memory address modes, processor registers, and address and data formats.

Computer Organization is a lower level and detailed explanation of the system that includes how the dissimilar parts of the system are interconnected and how they interoperate in order to implement the ISA.

 System Design which having all of the other hardware components within a computing system such as:

        Computer buses and switches

        Direct Memory Access (DMA)

        Memory controllers

        Issues like multi-processing