Concurrency and parallelism with Elixir and BEAM (opens in new tab)

From Patryk Bak - a programming blog: Imagine coming to an overcrowded fast food restaurant to order the best taco in the country and there’s only one cook working there. He prepares each taco one by one. Although the cook has an extra time while waiting until a tortilla heats up, he doesn’t start preparing another order until the first one is finished.