Comment by ascar

I don't think IO bound and CPU bound problems are the correct way of differentiating between the two. Parallel programming deals with real-time problems with data dependencies and synchronization requirements. While concurrent programming deals with independent computations, where progress or completion of one does not depend on the progress of another.

I agree however they do ultimateively solve two very different domains of problems and there is a lot of confusion going on here.

On a side note: matrix multiplcation is generally not a CPU bound problem, but a memory bound one.