“There are dozens of Linux distributions, but only one Linux.
There are over a dozen open-source Web servers, but only one
Apache. When it comes to content management systems, however, there
are over a hundred choices, and there is no market leader.
“And, unlike Linux, where the distributions are variations on a
single theme, most CMSes (content management systems) are quite
incompatible with each other and take very different routes to
achieve the goal of making complex Web sites manageable…”