Introduction To Computer System
In this introduction to computer system we will discuss in detail various technical features related to the Computer system . The introduction to computer system includes computer system hardware , computer system software And Computer System Design and System Architecture .
Computer System - Table Of Contents
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What Is Computer System ?
A Computer system is defined as programmable electronics device that can be programmed to accept some inputs in terms of data , then process this data as per the program instructions and provide the Output in the desired format that can be used for some meaningful work .
Features Of Computer System
Computer System Is Programmable
The Computer is programmable. That means , computer will perform the task only as per the program instructions . And therefore , the computer needs a program written in a programming language to execute a particular task on the computer. The Computer program directs the computer through series of instructions.
Computer Accepts Input And Provides Output
The Computer Systems are used to perform a specific tasks . For example , a company might use computer for billing , record keeping , payroll processing , accounting and many such applications. The Computer are used to process raw data and produces information as per program instructions. The information can be used for some meaningful work such as decision making within an organization .
Computer System Is Digital Machine
The Computer is a digital electronic machine . That means , computer can understand and execute instructions on in binary which consist of only two numbers that is 0 and 1 . The binary code is also referred as machine code or machine language .
The computers micro-processor can understand and execute instructions only in machine code in Binary . So , it doesn’t really matter in which programming language you write your program code because eventually , all computer programs must be first converted to machine code in binary consisting of only 0 and 1.
Components Of Computer System
The Computer system consist of four basic components Or Units . In terms of functionality , the computer system can be grouped in to four units .
The Computer System Components are :
- Input Devices ( Input Unit ) .
- CPU ( Central Processing Unit ) .
- System Memory ( Memory Unit ) .
- Output Devices ( Output Unit ) .
Input And Output Devises
Computer System Input Unit
The term “Input Unit ” ( Input Devises ) refers to the input provided by the user by using any input device such as keyboard , mouse , mike , camera or any storage device in the form of input data to be processed by the computer system CPU ( Central Processing Unit ) .
Computer System Output Unit
The term “Output Unit ” refers to the output provided by the computer CPU after processing the user data inputs . This output is then sent to the output device such as monitor , printer , speaker to provide desired output to the user. The output can also be stored on any storage device for future use.
Computer System Architecture
What is Computer System Architecture ?
In computer engineering, the computer system architecture is the conceptual design and fundamental operational structure of a computer system. It is the technical drawings and functional description of all design components and requirements . The system architecture defines the system performance parameters such as speed and interconnections .
The System architecture can also be defined as the science and art of selecting and interconnecting hardware components to create computer system that meet functional , performance and cost goals. And therefore , better architecture will produce a better design and system performance.
Computer System Block Diagram
The Computer system consist of four basic components Or Units . In terms of functionality , the computer system can be grouped in to four basic units .
The computer system mainly consist of hardware components and the software components . All the physical components inside the computer cabinet and the input / output gadgets attached to the computer are referred as hardware components .
The hardware components inside the computer cabinet are referred as internal components such as motherboard .The external hardware components attached to the computer system are also referred as peripheral devices such as keyboard , mouse , monitor .
The computer system software can further be classified as System Software And Application Software . The System software is used by the system itself manage and control the system components. The System software includes Operating System ( OS ) ,device drivers and other system utility programs . The application software are used by the computer user such as MS Word , Excel .