> A wire signal is a brevity code used by telegraphers to save time and cost when sending long messages. > Today, amateur radio operators still use codes 73 an

> A wire signal is a brevity code used by telegraphers to save time and cost when sending long messages. > Today, amateur radio operators still use codes 73 and 88 regularly, and -30- is used in journalism, as it was shorthand for "No more - the end".