kernel execution level
51Executable space protection — In computer security, executable space protection is the marking of memory regions as non executable, such that an attempt to execute machine code in these regions will cause an exception. It makes use of hardware features such as the NX bit.The… …
52Profiling (computer programming) — In software engineering, profiling ( program profiling , software profiling ) is a form of dynamic program analysis that measures, for example, the usage of memory, the usage of particular instructions, or frequency and duration of function calls …
53Unix — (officially trademarked as UNIX, sometimes also written as Unix with small caps) is a computer operating system originally developed in 1969 by a group of AT T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Douglas McIlroy, and… …
54Embedded system — Picture of the internals of an ADSL modem/router. A modern example of an embedded system. Labelled parts include a microprocessor (4), RAM (6), and flash memory (7). An embedded system is a computer system designed to do one or a few dedicated… …
55ABAP — Infobox programming language name = ABAP/4 logo = paradigm = Object oriented, structured, imperative year = 1980s designer = SAP AG typing = Static, strong, safe, nominative implementations = SAP R/2,SAP R/3 dialects = influenced by = Objective C …
56Simultaneous multithreading — Simultaneous multithreading, often abbreviated as SMT, is a technique for improving the overall efficiency of superscalar CPUs with hardware multithreading. SMT permits multiple independent threads of execution to better utilize the resources… …
57DNIX — Company / developer Dataindustrier AB OS family Unix like Working state Historic Source model Closed source Latest stable release 5.4 …
58Physical Address Extension — In computing, Physical Address Extension (PAE) is a feature to allow (32 bit) x86 processors to access a physical address space (including random access memory and memory mapped devices) larger than 4 gigabytes. First implemented in the Intel… …
59Linux on System z — History of IBM mainframe operating systems On early mainframe computers: GM OS GM NAA I/O 1955 BESYS 1957 UMES 1958 SOS 1959 IBSYS 1960 CTSS 1961 On S/360 and successors: BOS/360 1965 TOS/360 1965 TSS/360 1967 MTS 1967 …
60Microsoft Windows library files — Like most modern operating systems, Microsoft Windows supports shared libraries, collections of code which can be used by multiple processes while only being loaded once into memory. Windows terms its shared libraries Dynamic link libraries… …
