Glossary:
1. process: the process is a running event has a separate function on a data collection program
2. Thread: A thread is in the process of sub-tasks independently executable, is the basic unit independent scheduling and dispatching system
3. primitive: an operating system kernel to accomplish a particular function in a process, during execution of the process are inseparable, exhibits characteristics atoms
4. mutual exclusion and synchronization process: (1) mutually exclusive: for a certain system resources, if a program is available to him, then the other programs you want to access it needs to wait. (2) two or more processes, common access to the same system resources, process synchronization is a multi-channel system between the process mainly due to constraints partnership between processes.
5. semaphore: is showing a process of certain resources and entities associated queue integer variable, its value can only be changed by P, V operation
6. critical area: the process of access to critical resources that code, also known as the critical end segment.
7. Deadlock: multi-channel program, there are two or more processes a result of competition for resources or improper order to promote mutual wait caused by imagination or impasse, if no external force, unable to advance.
