FUNDAMENTAL

Data==>Raw data..which is without processed..

information==>which is produced after process==>in+formation

WHAT IS COMPUTER?

Definition:Computer is an electronic device that receives input, stores or processes the input as per user instructions and provides output in desired format.

=======================================

• Computer is a programmable electronic device .
• It is developed by Charles Babbage near 19th century.
• The word computer is derived from the word compute.

Common Operating Machine Purposely Used for Technological and Educational Research.========COMPUTER

The processes that can be applied to data are of two types −

• Arithmetic operations − Examples include calculations like addition, subtraction, differentials, square root, etc.
• Logical operations − Examples include comparison operations like greater than, less than, equal to, opposite, etc.
• Parts/components of Computer

 

           The basic parts of a computer are as follows −

• Input Unit − Devices like keyboard and mouse that are used to input data and instructions to the computer are called input unit.
• Output Unit − Devices like printer and visual display unit that are used to provide information to the user in desired format are called output unit.
• Control Unit − As the name suggests, this unit controls all the functions of the computer. All devices or parts of computer interact through the control unit.
• Arithmetic Logic Unit − This is the brain of the computer where all arithmetic operations and logical operations take place.
• Memory − All input data, instructions and data interim to the processes are stored in the memory. Memory is of two types – primary memory and secondary memory. Primary memory resides within the CPU whereas secondary memory is external to it.
• Control unit, arithmetic logic unit and memory are together called the central processing unit or CPU.
•  Computer devices like keyboard, mouse, printer, etc. that we can see and touch are the hardwarecomponents of a computer.
•  The set of instructions or programs that make the computer function using these hardware parts are called software. We cannot see or touch software. Both hardware and software are necessary for working of a computer.  
• 
  
                                                    

Characterstics of computer:-

• speed
• Accuracy
• storage
• Quick decision
• Repeted capability
• Accuracy:-Computer perform any calculation 100% accurate. No mistake can be 

done by the computer. Any Errors can be occur because of invalid data input by the 

user.

• Delegency : Computer can work over the days, weeks , months and even years in continuation. It never become lazy during the operations.
• we can repeat the similar task again and again many times.

• Versatility: computer is a versatile machine/system which is used by the different typesof users to perform different types of task:-
• for example one PC can be used for 

communication

entertainement

official task

business

accounting

billing

Automatic :

computer is an autometic machine,once you put it into any operation, it automatically carries on the task upto completion.

Disadvantage of computer

• Computers have no intelligence; they follow the instructions blindly without considering the outcome.
• Regular electric supply is necessary to make computers work, which could prove difficult everywhere especially in developing nations.

=======================================================================