/usr/share/doc/

The directory, on Gentoo systems, contains documentation that is bundled with each package.

Many of the files in are compressed, using  by default. To view such a compressed text file easily, use :

This works because the invocation is piped to  by default via the LESSOPEN shell variable.

External resources

 * devmanual.gentoo.org — Explains docinto dodoc dohtml einstalldocs DOCS and HTML_DOCS