multilevel control
51Smoking ban — An internationally recognizable No Smoking sign …
52Technical features new to Windows Vista — This article is part of a series on Windows Vista New features Overview Technical and core system Security and safety Networking technologies I/O technologies Management and administration Removed features …
53Meta-power — is a concept of having control not simply of individuals, but of the social structures themselves. The idea has stemmed from work by sociologists such as Tom R. Burns and Peter Hall, the economist Thomas Baumgartner, as well as by political… …
54CP/M — A screenshot of CP/M 86. Company / developer Digital Research, Inc. / Gary Kildall Programmed in PL/M Working state Hi …
55High-voltage direct current — HVDC or high voltage, direct current electric power transmission systems contrast with the more common alternating current systems as a means for the bulk transmission of electrical power. The modern form of HVDC transmission uses technology… …
56History of operating systems — The history of computer operating systems recapitulates to a degree the recent history of computer hardware. Operating systems (OSes) provide a set of functions needed and used by most application programs on a computer, and the linkages needed… …
57Protected mode — This article is about an x86 processor mode. For Internet Explorer Protected Mode, see Mandatory Integrity Control. x86 processor modes Mode First supported Real mode Intel 8086 8080 emulation mode NEC …
58Microsoft Windows — Windows redirects here. For the part of a building, see Window. For other uses, see Windows (disambiguation). Microsoft Windows …
59OS/2 — A typical OS/2 Warp 4 desktop Company / developer IBM Microsoft …
60OS4000 — Company / developer GEC Computers Ltd. Programmed in Babbage[1] Working state No further development, but still supported Source model Closed source Initial release …
