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Inter-process communication (IPC) is the exchange of data between one process and another, either within the same computer or over a network. It implies a protocol that guarantees a response to a request. Examples are Unix sockets, RISC OS's messages, Mach ports, OS/2's named pipes, Microsoft Windows' DDE, Novell's SPX, Apple Macintosh's IAC (particularly AppleEvents) and different forms of software componentry ( CORBA, component object model ...).

Although IPC is performed automatically by programs, an analogous function can be performed interactively when users cut and paste data from one process to another using a clipboard.

Table of IPC Methods:

Method	Operating Systems
SignalA signal may refer to: an abstract element of information, or, more exactly, usually a flow of information (in either one or several dimensions). See Signal (information theory . in electronics) a signal is any physical phenomenon that can be modeled as a	All operating systems
Pipe (computing)A pipe is an operating system mechanism originating in Unix, which allows the user to direct the output of one shell command through another command. See Pipe (Unix). Pipe or vertical bar ( or ) is the name of the ASCII character at position 124 (decimal)	All POSIX systems
Named Pipe	All POSIX systems
Files	All systems
Shared Memory	All POSIX systems
mmapIn computing, mmap ) is a POSIX compliant Unix system call that maps files or devices into memory. In Linux, mmap can create several types of mappings. Anonymous mappings are mappings of physical RAM to virtual RAM. This is similar to malloc , and is used	All POSIX if temp file is used, may carry race condition risk

References

System V IPC under LinuxThis article is about Linux-based operating systems, GNU/Linux, and related topics. See Linux kernel for the kernel itself. See Linux (washing powder) for the Swiss brand of washing powder. Tux, a plump penguin, is the official Linux mascot Linux is the n ( man page)

This article was originally based on material from the Free On-line Dictionary of Computing, which is used under the GFDL.

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