Windows

It powered the PC revolution with its central processing units that went inside all Windows computers.

"Windows won't obscure the light of the aurora but, depending on street lights, it might be trickier."

"Windows were all shattered. Everyone seemed conscious and OK, but I only saw the scene for about 15 seconds."

Similarly, open-source alternatives are available for common software packages like Office and Windows, but while proponents say they are more transparent and accessible, none is as comprehensive or well known.

Windows should be opened overnight or in the early morning to allow the daytime heat to escape, then closed again during the day when the air outdoors is hotter than inside.