*Explanation*

The above graph is of a scalable parallel computer with 128 nodes.
It shows that the region of computation in a parallel computer
is bounded by latency, speed, precision and memory. The left side
of the curve is bounded by latency, the top of the curve is bounded by
peak speed, and the right side of the curve is bouned by precision or
memory. All the computation has to be done within this region. Clearly,
we can increase this region by reducing latency, increasing the
speed and increasing precision or memory of the computer.