FM: Frequency Modulation. A radio system introduced as a more modern equivalent to Long Wave and Medium Wave (which are AM). FM provides the option of Stereo sound (where transmitted) and generally increased audio quality. On the other hand, there are still areas of the country where FM reception is not perfect, and for a long time it was non-existent in some areas. Probably the Digital of its day. _Is it not possible to do stereo with AM? Perhaps it was never done, but i don't *think* it's a technical limitation._ _And what's this with the DoubleSpacesAfterFullStops?_