IPC Interprocess Communication of the system: IPC is a new Interprocess communication mechanism that provided by the UNIX system V, it strengthens the communication function between the Interprocess consumedly.

• 系统内部的IPC进程间通讯：IPC是UNIX系统V提供的一套新的进程间通讯机制，它大大增强了进程间的通讯功能。 IPC机制包括三种形式即消息队列、信号量和共享内存。