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Enter a keyword...   ...or choose a category. choose one... Communications Computer Industry Companies Computer Science Data Graphics Hardware Internet and Online Services Mobile Computing Multimedia Networks Operating Systems Programming Software Standards Types of Computers World Wide Web   PID Last modified: Tuesday, April 18, 2006  Short for process identifier, also called a process ID. It refers to the number assigned to a process by the operating system to uniquely identify a process running on a system.   Related Categories Operating Systems Related Terms computer operating system process system task Task Manager task switching Shopping PID Products Compare Products,Prices and Stores Shop by Category: Security Systems and Surveillance 2 Store Offers Pets 234 Store Offers Building Supplies 20 Store Offers Espresso Machines & Coffee Makers 5 Store Offers