The World-Wide Web (WWW, W3) is a wide-area hypermedia information
retrieval initiative (pioneered at CERN) aiming to provide easy access
to a variety of media. Hypertext documents can include text, sound,
images, movies, ..., as well as links to other such media which can be
located elsewhere on the network. The currently supported methods of
access (specified in the links) include ftp, telnet, news, gopher, wais,
and http (hypertext transmission protocol). Hypertext documents can also
be interactive, e.g., the mp_arc "home page" allows keyword searches
of (the entire text contained in) the preprint/abstract database.

>> how to access mp_arc through the World-Wide Web

URLs (uniform resource locators) for the mp_arc "home page" are
http://www.ma.utexas.edu/mp_arc/index.html
http://mpej.unige.ch/mp_arc/index.html
http://www.maia.ub.es/mp_arc/index.html

Such links can be incorporated into any hypertext file, e.g.,
the "home page" of your local institution or department.
Depending on the software used, this link can also be specified
on the command line and/or added to a personal "hotlist".