The programs range from complex instructions for displaying pop-up windows to a 36-line memory-management utility from the open-source game Rooms of Doom that software writers love because it's more compact than the 72-line alternative.
It ran at 90% of capacity in 2008, according to the Energy Information Administration, and Central Vermont Public Service says it's the most reliable source of power the utility has access to.
At one time a person could throw a dart at a page of utility stocks and be pretty sure of coming up with a company that had a stable revenue source and a good dividend yield.