ICBM address: n. (Also `missile address') The form used to
register a site with the Usenet mapping project, back before the day
of pervasive Internet, included a blank for longitude and latitude,
preferably to seconds-of-arc accuracy. This was actually used for
generating geographically-correct maps of Usenet links on a plotter;
however, it became traditional to refer to this as one's `ICBM
address' or `missile address', and some people include it in their
sig block with that name. (A real missile address would include
target elevation.)