Concurrency vs Parallelism

3 tasks:

-A-A-A-|
-B-B-B-|
-C-C-C-|

Serial vs. Parallel

Serial (one processor):

-A-A-A-B-B-B-C-C-C-|

Parallel (multiple processors):

-A-A-A-|
-B-B-B-|
-C-C-C-|

Sequential vs Concurrent

Sequential (one task in progress at any time):

-A-A-A-B-B-B-C-C-C-|

Concurrent (multiple tasks in progress at any time):

-A-B-C-A-B-C-A-B-C-|