The four main components are main memory, arithmetic and logic unit, control unit, and input/output (I/O). :)
<span>Operating System is the software that gives the computer instructions on how to run applications. It is considered the most important program that runs on a computer because it manages all the hardware and software on it. It also controls the display/keyboard. </span>
Solution:
A(n) extranet is a lan that uses the same technologies as the internet but is provided to invited users outside the organization who access it over the internet.
An extranet is a private network that uses Internet technology and the public telecommunication system to securely share part of a business's information or operations with suppliers, vendors, partners, customers, or other businesses. An extranet can be viewed as part of a company's intranet that is extended to users outside the company. It has also been described as a "state of mind" in which the Internet is perceived as a way to do business with other companies as well as to sell products to customers.
This is the right answer.
I believe the answer would be the JPEG file extension.