Computer Science / Unit 2 CS 0053 short lesson, about 20 seconds
"Concurrent Means Parallel"
Captions available
The idea
Concurrency on a single processor is not parallelism — the machine alternates between tasks, sharing one resource by turns, which costs efficiency that true parallelism keeps.
In practice
One clerk juggling two shop counters serves both, slower than two clerks would.
Where people slip
Alternation resembles simultaneity from far enough away.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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