Basic Computer Concepts

                      

Overall, a computer has a basic concept that the input - process - output. All kinds of computers that exist today, just for a defective computer, it must of course an equipment which is named for the computer:

> Input Device
   Input devices are, whose function is to transfer data inserted into a computer. Types
   Type
   Input devices, a computer that we have to meet often, are:

   1.Mouse
   2.Keyboard
   3.Touch Screen
   4.OCR scanner
   5.Bar Code Scanner
   6.Censorship
   7.Camera
   8.Microphone

> Central Processing Unit (CPU)
 
   CPU is used as a sequence of events in the control of the computer and because it also diebut CPU as the brain of a computer. In addition to these functions and other functions as the site for various data processing are carried out. For example: mencata to see, count, read, remember, compare sort Maupu.
In the work function of the CPU is tebagi:
 A. Internal memory / main memory that is used to store data and programs.
     - RAM (Random Access Memory)
        RAM is memory that is accessible and writable, the temporary memory and is
        memorynya lost when the power fails.
     - ROM (Read Only Memory)
        A memory that can be read only computer, but can not be filled.
     - Change memory
        Is a high-speed memory, but expensive. in computers, this worked to
        Storing frequently accessed data over and over again in order to speed up the process.
 B.Second ALU (arithmetic logical unit) is used to perform various calculations.
 C.Third Control unit for managing the entire operation of the computer.
     CPU is also called the microprocessor. Where can you work is influenced by the capacity of the
     microprocessor bit processing and also the frequency of his works.

> Output Device
   Is a tool to serve the results of processing or management of data from the CPU to a medium containing human readable, or can be used to process the data storage release. Output device types can be classified computer owned four forms:
 1.Write
 2.Picture
 3.Vote
 4.Form that can be read by a machine
While the output device:
  1.Monitor / Display / Display
  2.Printer
  3.Plotter
  4.Speaker
  5.Disk Drive

> External Storage
   Can be interpreted as a memory kit that is outside the CPU. can be used as a secondary storage or storage or backup storage, the backing, was referred to store data and programs. To function, the data and programs in the external memory stored first in the internal memory to be moved. Type of external memory:

   -Hard Disk
   -Floppy Disk
   -Magnetic tape
   -Papilla