These seem to be commonly used in the USA - are they used elsewhere?
They're used everywhere, but not every country requires them to be spoken aloud. They can be transmitted or recorded in other methods that are not audible to the listener.
Japan, for example, uses the American method. You can hear it if you stream JODW/Tokyo.
They're used everywhere, but not every country requires them to be spoken aloud. They can be transmitted or recorded in other methods that are not audible to the listener.
Japan, for example, uses the American method. You can hear it if you stream JODW/Tokyo.