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Welcome, let's discuss computer architecture and computer organization. while discussing various concepts about Computers you will come in contact with the words Computer Architecture and Organization. it is better to understand them at this level before discussing other concepts.
Let's understand these two concepts with the help of an example.
Let's assume you are building a house. so before making a house you need a design of your house so you hired an architect. you told the architect your requirements that you want 5 bedrooms with attached bathrooms, a hall a kitchen and a parking area. you gave the architect your requirements. and based on the requirements you got designs of your house. you may get more than one design fulfilling your requirements. so here the architecture will be your requirements. the things you need and the organization will be the actual implementation of your architecture.

Now let's understand the concept in terms of computers. in the architectural design of the computer, the features are decided i.e what are the functions of the computer or requirements, what are the operation it is going to perform? Is it going to perform addition? Subtraction? Multiplication? Division?Data Encryption? Decryption? What are the types of memory access? will the instructions and data will be in the same or different memory? Is it going to support The Serial Interface? The Parallel Interface ? all the features are going to be discussed on the architectural issue. And based on a particular architecture how those requirements are going to be fulfilled is the organizational design issue. that is if our computer is capable of doing multiplication then how it is going to do multiplication whether it will use the existing addition circuit or a dedicated multiplication unit will be allocated. How the Serial Interface will be implemented? How the Parallel Interface will be implemented? how to connect all the components? Solving all the requirements are part of the organizational study.

A single computer architecture may have more than one organization of components. some may provide more speed but consume more power some may be slower consuming less power.
So the study of the functional behaviour of your system that is the functions available is Computer Architecture whereas the Study of implementing a particular Architecture is the Computer Organization.
First, a new Architecture is designed then Organizations are designed. organizations are improved over time by making hardware changes without changing the existing Architecture. So we can conclude that the designing the functions of a computer is Computer Architecture and Implementing a particular computer architecture and making a computer is Computer organization.

Okay, let me differentiate between the other two terms Computer Architecture and Processor Architecture.
A computer Architecture deals with the designing of entire computer systems whereas Processor Architecture deals with the design of a processor only. for example, x86 is a processor architecture whereas Von Neuman is computer architecture.
Okay, that's all for this video and we are going to discuss more on computer organizations in the upcoming videos.
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