Subliminal is a Linux distribution for embedded devices. The idea was that you'd never notice that it was a Linux box, thus sneaking Linux into industrial applications.
Subliminal exists in eight primary versions, each with variants. They share the same ultra-compact memory footprint and ability to run from systems with no moving parts.
the specsheet runs something like this:
It's excellent for industrial monitoring applications. It belongs to Dexdyne, who are clueless and will never distribute it properly. (Maybe, guys, you'd like to TELL SOMEONE ABOUT IT?)