  Galilean conformal algebra (GCA) is an Inonu-Wigner (IW) contraction of a
conformal algebra, while Newton-Hooke string algebra is an IW contraction of an
AdS algebra which is the isometry of an AdS space. It is shown that the GCA is
a boundary realization of the Newton-Hooke string algebra in the bulk AdS. The
string lies along the direction transverse to the boundary, and the worldsheet
is AdS_2. The one-dimensional conformal symmetry so(2,1) and rotational
symmetry so(d) contained in the GCA are realized as the symmetry on the AdS_2
string worldsheet and rotational symmetry in the space transverse to the AdS_2
in AdS_{d+2}, respectively. It follows from this correspondence that 32
supersymmetric GCAs can be derived as IW contractions of superconformal
algebras, psu(2,2|4), osp(8|4) and osp(8^*|4). We also derive less
supersymmetric GCAs from su(2,2|2), osp(4|4), osp(2|4) and osp(8^*|2).
