What is a computer?

Computer comes from the Latin computare which mean count. Because the extent of cultivated fields of computer science, experts and researchers in defining termininologi slightly different computer.

    * According to Hamacher [1], the computer is an electronic calculating machine, fast and able to receive digital input information, then process it in accordance with programs stored in memory, and generate output information.

    * According Blissmer [2], the computer is an electronic instrument that is able to perform several tasks as follows:
      - Receives input
      - Processing the last input in accordance with the program
      - Keep the commandments and the results of processing
      - Provides output in the form of information 

    * Whereas, Fuori [3] argues that the computer is a data processor that can perform large calculations quickly, including the calculation of arithmetic and logic operations, without interference from humans.
To realize the conception of the computer as a data processor to generate information, then the required computer system (computer system) which consists of elements of hardware, software and brainware. The third element of the computer system must be interconnected and form a unity. Hardware will not work if without the software, and vice versa. And both are not useful when there is no human (brainware) who operate and control it.

   1. Hardware or Hardware: equipment that is physically visible and can djamah.
   2. Software or the Software: a program that contains instructions / commands to perform data processing.
   3. Brainware: people who operate and control the computer system.