IIIMF stands for Internet/Intranet Input Method Framework.
IIIMF is designed to be the next generation of input method framework

UNIcode Table based generic composition engine with lookup-choice capability,
originally shipped with Solaris 9 update. Since the Unit started as hile,
the HIndi LE, this engine comes with Indic scripts tables, but it does not
mean this engine only supports Indic, it can be enhanced to wider scripts
coverage.

WWW: http://www.openi18n.org/subgroups/im/IIIMF/