He could've described SIMD with gophers: putting only one manual per cart is SISD vs. putting several manuals per cart which is SIMD Also his example (moving

He could've described SIMD with gophers: putting only one manual per cart is SISD vs. putting several manuals per cart which is SIMD Also his example (moving manuals) is really example of parallelism and not concurrency. He has one large problem, which is decomposed to two smaller problems. Not much different from multiplying two large vectors. The real example of concurrency would be: librarians handling books returned to the library. They don't know how many books will be returned and when - i.e. very similar to web server handling HTTP requests.