The Internet Portal is a site for providing a lot of services such as mail, weather, news, search, discussions, etc., to its visitors in the framework of one Internet Site.
The Internet Portals are divided into public and corporate ones.
Yandex and Yahoo sites can serve as the examples of public portals. Such sites are opened for use by anyone visitor.
The corporate portals are intended for use within a company. The corporate Internet portal can contain news and information about structure of a company, internal events, a schedule of meetings, employees' birthdays, and other entities.