= I =
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.)
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.