OpenIndiana (OI) is a distribution of illumos, which is a community fork of OpenSolaris. And OpenSolaris itself was the open source version of Solaris, before it (OpenSolaris) was discontinued by Oracle, after Oracle acquired Sun Microsystems, Inc., in January 2010. Before OI’s base was switched to Illumos, it was based on OpenSolaris. I know this [...]
OpenIndiana is a continuation of the OpenSolaris operating system. It was conceived during the period of uncertainty following the Oracle takeover of Sun Microsystems, after several months passed with no binary updates made available to the public.