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Multithreading is a feature of modern computer hardware and software that allow independent multiple threads to appear to run at the same time. The operating system gives each thread a time slice, then suspends the thread and allows a different thread to run. This allows for greater flexibility and in programs and higher responsiveness of the computer as a whole. For example, a program that performs a lengthy operation can do so in a separate worker thread while the main thread can continue to take in more user input or provide progress reports on the background thread's progress.