"This post is about the desktop operating systems that fly under
the radar of most people. We are definitely not talking about
Windows, Mac OS X or Linux, or even BSD or Solaris. There are much
less mainstream options out there for the OS-curious.
"These alternative operating systems are usually developed
either by enthusiasts or small companies (or both), and there are
more of them than you might expect. There are even more than we
have included in this article, though we think this is a good
selection of the more interesting ones and we have focused
specifically on desktop operating systems.
"As you will see, many of them are very different from what you
may be used to. We will discuss the potential of this in the
conclusion of this article."