Concurrency is dividing up the execution paths of your program so that they are possibly running at the same time. Apple has high level APIs to achieve concurrency like Grand Central Dispatch and operation queues.
Amit is an iOS Developer who loves teaching and speaking about iOS. When not in front of a computer, he's exploring the outdoors or meditating. Find him on Twitter @paradoxed.
You need to sign up for Treehouse in order to download course videos.