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:
- 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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