Web portals are a key tool for libraries today. These online sites provide patrons/users with the library’s OPAC, calendars of events, hours of operation, library policies, blogs, and so much more. Library majors study library web portals to better understand how they serve the library and the patrons, what such a portal should include, and how librarians run them as efficiently as they can.
The Advent of Portals
Check out this 2002 article from Library Journal which discusses the advent of Web portals in universities and libraries.
an extensive list of library web portals created by NHS
Library portals: toward
Page Revised Dec. 16, 2012