  A brief review is given of the ways of testing SUGRA unified models and a
class of string models using data from precision electroweak experiments,
Yukawa unification constraints, and constraints from dark matter experiments.
Models discussed in detail include mSUGRA, extended SUGRA model with
non-universalities within SO(10) grand unification, and effective theories with
modular invariant soft breaking within a generic heterotic string framework.
The implications of the Hyperbolic Branch including the focus point and
inversion regions for the discovery of supersymmetry in collider experiments
and for the detection of dark matter in the direct detection experiments are
also discussed.
