  In this talk I review recent developments in superstring theory. In the first
half of the talk I discuss some of the earlier developments in this subject.
This includes a review of the status of string theory as a unified theory of
gravity and other interactions, the role of duality in string theory, and
application of string theory to the problem of information loss near a black
hole. In the second half of the talk I review the developments of the last two
years. This includes application of duality symmetries, Matrix theory,
Maldacena conjecture, and derivation of gauge theory results from string
theory. In choosing the list of topics for this talk, I have focussed on those
which are likely to be of some interest to non-string theorists, thereby
leaving out many of the marvelous technical results in this subject.
