Info is the official GNU documentation system. Prior to GNU, it was
the system of internal documentation of Emacs.

To produce Info documents it is enough with a simple text editor, but
the Texinfo format is designed to create it automatically, with all
its features (indexes, cross references, appendices, etc.).

Info documents are composed of nodes, which can be thought of as
chapters, sections, subsections, etc.. But it is not really necessary
to take this hierarchical structure. These nodes are linked by
references from other nodes and menus, creating a system of
documentation which could include any text, not only textbooks but
also novels, poems or whatever you want.

To navigate in this sea of documents there are specific programs:

1 .- The Emacs itself still remains with its Info internal sub-system;

2 .- Some reader (independent from Emacs) Info browser that can access
the documents from the console, either text or graphic. The Texinfo
package includes an Info reader of this kind, that has the same name
and is the official GNU one, with the most comprehensive functions,
but there are others, like pInfo, xinfo etc.

As we pointed out at the page about Texinfo, the Spanish-speaking
community is facing the problem of the name of the nodes. If the
original document is written in English, which is usual, nodes are
also named in that language and references to them should respect that
name (up to find a solution).