/hi:' mohb' ee/ 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 generalised 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 grokked this instantly. See moby. [Jargon File]