Responder is a resource placed in individual Macintoshes that identifies
that computer - and any others in the network that have Responder installed
- when the Inter*Poll program runs. At startup time, Responder reads the
name of the user and the Macintosh name where it resides, then the versions
of the system software, LaserWriter driver, and AppleTalk. Inter*Poll
requests this information later to tell the system administrator the
characteristics of the user's system. Inter*Poll interrogates each system,
and Responder answers Inter*Poll.