Loop is a control structure that causes a statement or group of statements to repeat.Before entering a loop, the first input, or the accumulator where the total will be kept is retrieved to an initial value, usually zero.
HTML: Hyper Text Markup Language.
HTML is the markup language used for defining the structure, and very basics of a web page - one wouldn't be possible without this language!
HTML is combined with CSS (Cascading Style Sheet) to improve visuals, and combined with a language such as Javascript to add functionality and interaction with the web page.
Intranet is the answer to this question.
Google definition: An intranet is a network based on TCP/IP protocols (an internet) belonging to an organization, usually a corporation, accessible only by the organization's members, employees, or others with authorization.