ADVANTAGE OF COMPUTER

1. Accuracy
2. No fatigue
3. memorising effect
4. analyses of data
5. speed
6. dynamic role
7. cost reduction
8. work autometically
9. no physiologically problem
10. intengible benefit
    

DATA PROCESSOR

The activity of processing data using a computer is called data processing.
Data process consist of three activities:

• Capture in input data
• Manipulating the data
• Managing output data 
  

MICROSOFT OFFICE

MS-office developed by MS Corporation his owner is Mr. “billgates”. MS office is a package of five content:

1. MS-word
2. MS-excel
3. MS-PowerPoint
4. MS-access
5. MS-outlook

OUTPUT DEVICE

Output device gives us a result(outputing) by putting a raw material(inputing) through input devices. Some output devices are given below:

1. Visual display unit(VDU)
2. Terminals
3. Printers

   

   output device

CLASSIFICATION OF COMPUTERS

Computers can be generally classified by size and power as follows:

1.      Personal computers

2.      Workststion

3.      Mini computers

4.      Mainframe

5.      Super computers

OPERATING SYSTEM

Operating system operate or give instructions to all the application and programming software.

TYPES OF OPERATING SYSTEM

1.      UNIX

2.      LINEX 

COMPUTER SOFTWARE SYSTEM

Software or program enable a computer to perform a specific task to the physical components of the system(hardware).

Software such as WORD-PROCESSOR, , OPERATING SYSTEM etc.

TYPES OF SOFTWARE

PRACTICALLY COMPUTER SYSTEM DIVIDE SOFTWARE INTO THREE MAJOR CLASSES:

1.      SYSTEM SOFTWARE- it helps run the computer hardware and computer system it includes operating system device drivers, services, utilities andmore

.

2.      APPLICATION SOFTWARE- Typically application include office automation, business software, educational software, medical software, data basis and computer games.

3.      PROGRAMMING SOFTWARE- The tool include text editor, compilers, interpreters, linkers.

4.      UTILITY SOFTWARE- the work of this softwre is anaging the computer.

 ex- ANTIVIRUS

COMPUTER HARDWARE COMPONENTS

• CPU (Central processing unit)
• CU (Control unit)
• ALU (Arithmetic logical unit)
• Magnetic disk
• Floppy disk
• Optical disk
• CD-ROM (Compact disk-ROM)
• Write once, read many (WORM)
• Erasable optical disk (EOD)
• Hard disk drive (HDD)
  

COMPUTER HARDWARE

The hardware are the parts of computer itself. Including the CPU and related microchips, keyboards, monitors and drives.

     it comprises are all of the physical parts of the computer such as monitor, CPU,

      motherboard, mouse etc.         

APPLICATION OF COMPUTER

1.      computer in scientific research

2.      computer in business & industries

3.      computer in educations

4.      computer in schools

5.      computer in entertainment applications

6.      computer in weather forecasting

7.      computer in banking applications

8.      computer in multimedia

9.    computer in sports applications

OPERATIONS OF COMPUTER

FIVE BASIC OPERATIONS FOR CONVERTING RAW INTO USEFUL DATA

Input data into useful informaton and presenting it to a user.

·         INPUTING- process of entering data and instructions into a computer system.

·         STORING- saving data and instruction to make them readily available for initial or additional processing as and when required.

·         PROCESSING- (1) performing arithmetic operations.

                  (2) logic operations on data to convert them into useful              

                    information.

• OUTPUTING- process of producing information or result for a user such as  PRINTED REPORTS or VISUAL DISPLAY.                                                                                                                       
• CONTROLLING- directing the manner and sequence in which above operation are perform.
  

CHARACTERISTICS OF COMPUTER

·         Speed

·         Accuracy

·         Verstality

·         Power of remebering

·         No IQ

·         No feeling

·         Automatic

·         Deligence

WHAT IS COMPUTER

The word computer comes from word "COMPUTE" which means to calculate. hence people usually consider the computer to be a calculating device. that can perform arithmetic operations at high scales.