Computer and its Components

The computer is just a dead collection of plastic, silicon and metal until you press the ‘Power’ button. One little burst of electricity and it starts a string of events that puts life and power into the machine. But, even at this stage, the computer is unaware of the potential that it holds within itself. The computer, today, is a fundamental part of the information age.
Initially, computers were developed to perform mathematical operations, but later on, they
were used to store the result of those operations, which with the time leads to the storage
of other data or information.

1. Data is a collection of unprocessed facts, figures and symbols.
2. Information is a data that is organized, meaningful and useful. It helps in decision making
   processes.
3. Hardware refers to the components that can be seen or touched. It comprises of input devices,
   output devices, system units, storage devices and a communication devices.
4. Software is a set of instructions that tells the computer to perform the task.
5. Primary memory helps in the fast execution of the program and it compromises of RAM
   and ROM.
6. Secondary memory is also known as Auxiliary Memory. It helps to store the data permanently
   using available storage devices such as Hard Disk, DVD, USB, etc.
7. Operating system is a computer program that manages all other programs stored on the
   computer.
8. IPO refers to input-process-output cycle which is followed by the computer system to achieve
   the desired result.
9. Most keyboards attach to the PC via PS/2 connector or USB port.
10. Pointing device such as mouse is connected to the PC via a serial port, PS/2 mouse port or
    USB port.
11. The process of decoding data that has been encrypted into secret format is called
    decryption.

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