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UNIX System V
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=== System V compatibility === The System V interprocess communication mechanisms are available in Unix-like operating systems not derived from System V; in particular, in Linux<ref name="kerrisk"/><ref>{{man|7|svipc|Linux}}</ref> (a reimplementation of Unix) as well as the BSD derivative [[FreeBSD]].<ref>{{man|2|msgsnd|FreeBSD}}</ref> POSIX 2008 specifies a replacement for these interfaces.<ref name="kerrisk"/> FreeBSD maintains a binary compatibility layer for the [[COFF]] format, which allows FreeBSD to execute binaries compiled for some SVR3.2 derivatives such as SCO UNIX and Interactive UNIX.<ref>Lehey, Greg. ''The Complete FreeBSD: Documentation from the Source.'' 2003. pp. 164-165</ref> Modern System V, Linux, and BSD platforms use the [[Executable and Linkable Format|ELF]] file format for natively compiled binaries.
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