Computer System is divided into two functional entities. Hardware and Software are two functional entities of computer system. Operating system is the link between hardware and software. There are a certain layers in computer system through which a process goes to perform a task. Here we will discuss about each layer.
Following are the different layers of abstraction in computer system:
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Problem Statement –
Problem Statement is stated using natural language. It may be ambiguous or imprecise. It is basically the user’s requirement from the system. -
Algorithm –
Algorithm is the step by step procedure to perform a specific task. It is guaranteed to finish. It has definiteness, effective computability and finiteness. -
Program –
Program expresses the algorithm using a computer language such as high level language and low level language. User writes the code for their problem statement. -
Instruction Set Architecture –
Instruction set architecture specifies the set of instructions the computer can perform using data types and addressing modes. -
Micro-architecture –
Micro-architecture is the detailed organization of a processor implementation. -
Logic Circuits –
Logic circuits combine basic operations to realize micro-architecture. -
Device –
Device has the properties of materials and manufacturability.
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