I have always referred to them as classic due to age, but I don't really know what system they belong to.
I have been running a Middle Earth 4th Age campaign using;
ICE RM 1300 Character Law & Campaign Law 1985?
ICE RM 1100 Arms Law & Claw Law 1985?
ICE RM 1200 Spell Law 1984?
ICE 1600 Rolemaster Companion II
and some other odds & ends.
Oh, and ICE 8000 Middle-Earth Role Playing 1986 for added flavor.
And lots of house rules!
Been having some scheduling issues - being an adult is hard sometimes
but hoping for another session in March/April
I have considered updating to RMU after the Beta2 gets released. Not a for sure thing though.