There has been a quiet revolution in the American (and international) auto industry in recent years.
David Crane, CEO of the electricity company NRG, cited a quiet revolution.
Pictures by Women is something of a quiet revolution, as well as a striking revelation.
in a graphical user interface, any of a set of options from which only one may be selected at a given time; the open circles in front of set of options, one of which may be selected
Only one radio button within the same group may be selected at a time.