Etymologically speaking, it means "Backwards outside brain skin", but three of those four roots are actually Greek; only "retro" is Latin.
"RED Number Two," apparently the second version of the treatment, was originally encountered by the Toughs on Haven Hive 2011-10-27 developed by Project Laz'R'us. It restored Max Haluska to life after Kathryn Flinders had shot him in the head 2011-08-20.
[Just what it says]
Other notable appearances
[This is for technology that does not appear regularly. For things like Annie Plants and the Hypernet, remove this section.]
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There is speculation that RED #2 may be what enabled Balt Binion to not die from a self-inflicted (though accidental) beheading on Oisrí.