Proper noun
Popek (plural Popeks)
A surname from Polish.
Definitions A VM or virtual machine was originally defined by Popek and Goldberg as "an efficient, isolated duplicate of a real machine." Source: Internet
While the 68000 had 'supervisor mode', it did not meet the Popek and Goldberg virtualization requirements due to the single instruction 'MOVE from SR' being unprivileged but sensitive. Source: Internet