The acronym for MIMO stands for multiple input multiple output. It is used when describing a devices input and outputs ports for sending or receiving information to and from other devices.

A diagram for input and output is typically shaped like a diamond. On one end you have the input, then arrows show where that input goes; this is typically to multiple locations. The arrows will then show how the information arrives at the output destination.

You compare the btu input with the btu output. Divide the input into the output and that will give you the efficiency. With multiple extraction you will have to add all the uses.

For example 100 million btuh input, with all sources of output having 82 million btuh-

divide 100 into 82, for .82, or 82% efficiency.

By providing multiple answers to the same equation using different variables..

Any sort algorithm where data is distributed from its input to multiple intermediate structures which are then gathered and placed on the output.