A Good Day to Die Hard is the third film of the Die Hard franchise.
In computing , multitasking is a concept of performing multiple tasks -LRB- also known as processes -RRB- over a certain period of time by executing them concurrently .. computing. computing. tasks. Task computing. processes. Process ( computing ). concurrently. concurrent computing. New tasks start and interrupt already started ones before they have reached completion , instead of executing the tasks sequentially so each started task needs to reach its end before a new one is started .. tasks. Task computing. As a result , a computer executes segments of multiple tasks in an interleaved manner , while the tasks share common processing resources such as central processing units -LRB- CPUs -RRB- and main memory .. tasks. Task computing. main memory. main memory. Multitasking does not necessarily mean that multiple tasks are executing at exactly the same time -LRB- simultaneously -RRB- .. tasks. Task computing. In other words , multitasking does not imply parallel execution , but it does mean that more than one task can be part-way through execution at the same time , and that more than one task is advancing over a given period of time .. parallel execution. Parallel computing. Even on multiprocessor or multicore computers , which have multiple CPUs / cores so more than one task can be executed at once -LRB- physically , one per CPU or core -RRB- , multitasking allows many more tasks to be run than there are CPUs .. tasks. Task computing. multiprocessor. multiprocessor. multicore. multicore. In the case of a computer with a single CPU , only one task is said to be running at any point in time , meaning that the CPU is actively executing instructions for that task .. Multitasking solves the problem by scheduling which task may be the one running at any given time , and when another waiting task gets a turn .. scheduling. Scheduling ( computing ). The act of reassigning a CPU from one task to another one is called a context switch ; the illusion of parallelism is achieved when context switches occur frequently enough .. context switch. context switch. Operating systems may adopt one of many different scheduling strategies , which generally fall into the following categories  :. scheduling. Scheduling ( computing ). In multiprogramming systems , the running task keeps running until it performs an operation that requires waiting for an external event -LRB- e.g. reading from a disk or tape , receiving a message from a network , reading from a terminal or other human input device -RRB- or until the computer 's scheduler forcibly swaps the running task out of the CPU .. multiprogramming. multiprogramming. Multiprogramming systems are designed to maximize CPU usage .. In time-sharing systems , the running task is required to relinquish the CPU , either voluntarily or by an external event such as a hardware interrupt .. time-sharing. time-sharing. hardware interrupt. hardware interrupt. Time sharing systems are designed to allow several programs to execute apparently simultaneously .. In real-time systems , some waiting tasks are guaranteed to be given the CPU when an external event occurs .. tasks. Task computing. real-time. Real-time computing. Real time systems are designed to control mechanical devices such as industrial robots , which require timely processing .. The term `` multitasking '' has become an international term , as the same word is used in many other languages such as German , Italian , Dutch , Danish and Norwegian .