Professor Hawking used an input device controlled by his cheek movements to choose the words he wanted to use. A special output device turned those words into electronic speech that people could hear.

Once you do so, you’ll see a listing of all of your Mac’s input and output devices. You can then easily switch between those devices with a mere mouse click. This method certainly beats having ...

To check furnace Btu output, gather the readings necessary ... These include: Model number Rated Btu input and output Maximum-rated total external static pressure (TESP) Temperature rise range (∆t) ...