This talk will present first a historical view on the
development of ad hoc networks, with some examples taken
from routing protocols. There are three communities in the
field, dominated by engineers, computer scientists, and
mathematician, respectively. This talk will present some
observations about the approaches taken by each community
and their differences. There is a need for more emphasizes
on design of localized protocols, based on more realistic
assumptions.  Ad hoc and sensor networks are experiencing
exponential growth since 1996. Further overall trends will
be discussed. Several specific problem areas in ad hoc and
sensor networks where speaker expects growing activity in
coming years will be listed.