Process

PROCESS 

• The processing unit control all actvities within the system.
• The control unit repeat a set of four basic operation called the "machine cycle"

FETCHING

• The process of obtain a program instructions or data item from memory.

DECODING

• The process of translating a program instruction into signal that the computer can execute

EXECUTING

• The process of implementing the instruction in a program.

STORING

• The process of writing the result to the storage or memory.

 

Information Processing Cycle

THE CENTRAL PROCESSING UNIT

• All procesing activities are done in CPU. It utilie the computer memory to execute instruction from the application software and accomplish a task. 
• The prcessor must be connected to input device,output device,and storage device to carry out the above mentioned task. 

THE INFORMATION PROCESSING CYCLE

• User will input the data to be processed by processor.
• Storage holds database,files,and program.
• The output device present the processed data as useful information product for the user

Introduction To Computer System

COMPUTER HARDWARE BLOCK DIAGRAM

• Input device feed raw data to procesor. A processer processe raw data and turns it into useful information. A storage device keeps or stores both processes and unprocess data for later usage. An output device shows or display the processed data  

Computer Software

There a 2 types of computer software , system software and application software . System software is any computer software that helps to run computer system . System software controls , integrate and manages the individual component of a computer system. 

COMPUTER  SOFTWARE : 

System software 

Examples: 

• BIOS program 
• Operating Systems 
• Utility programs 
• Programming languages          

Application Software 

Examples:

• word processing
• spreadsheets 
• databases
• accounting
• games
• Internet browser
• desktop publishing 

Computer Hardware

Computer hardware consists of : 

• input devices
• processor 
• output devices
• storage devices            

Input Devices : 

Input devices feed data or commands in a form that the computer can use. Example of input devices are :

• Keyboard
• Mouse         
• Digital camera     

   

Processor :

The CPU is an example of a processor . It has the same important as the brain to human being .
E;g:

Output Devices : 

Output devices such as the monitor shows people the process data or information . This type of information can be understood and use by computer user . Other example of output devices are

• Printer
• Speaker 
• Monitor             

        

                       

Storage Devices : 

Storage usually means secondary storage . It consists secondary storage devices such as hardisk, Floppy Disk , diskette ,CD ROM and DVD ROM .

     

        

What is Computer System ?

A computer system is defined as combination of components designed to process data and store files. A computer system is consists of four major hardware components : input devices , output devices , processor and storage devices. 

A computer system requires hardware , software and a user to fully function .                       Software  refers to set of instructions that tell the hardware what to do. Software can also have various other functions such as performing computation , communication with other software and human interaction. 

User refers to a person who uses the computer for any purposes such as work , business and entertainment .