COMPUTER

Computer is very important in modern life. Speed and accuracy in obtaining information are very needed. Solving the problem and making decision are necessities. In these cases, computer offers us much help. It has an ability to process data quickly and accurately.
The word computer derives from latin word computer. It means to consider. It is now well known as an automatic electronic medium. It is able to store, collect and process data.
The computer machine consists of three major devices. They are input devices, central processing unit and output devices.
Input devices are part that can be used to enter instructions or data into computer. They consist of keyboard, light pen, mouse, scanner and optical mark reader.
Central Processing Unit or CPU is the brain of computer. Here the instruction and data from the input devices are processed and field into computer memory system. There are two types of memory system. They are external memory and internal memory. External memory all instructions and data either before or after processing will be stored in diskette, USB, CD, or hard disk in CPU of the computer. Internal memory is a part of the system that is used to store data or programs either permanently or temporally.
Output devices the instructions and data that enter the computer will be processed. The output or the result will be displayed in output devices, such as screen monitor and printer.
The use of computer increase significantly in recent years, not only in business, but also in school as well as at home.