high moby

high moby: /hi' mohb'ee/ n.  The high half of a 512K
   {PDP-10}'s physical address space; the other half was of course
   the low moby.  This usage has been generalized in a way that has
   outlasted the {PDP-10}; for example, at the 1990 Washington D.C.
   Area Science Fiction Conclave (Disclave), when a miscommunication
   resulted in two separate wakes being held in commemoration of the
   shutdown of MIT's last {{ITS}} machines, the one on the upper
   floor was dubbed the `high moby' and the other the `low moby'.
   All parties involved {grok}ked this instantly.  See {moby}.