We introduce and solve an anisotropic model of self-organized critical
ity. The exponents are tau = 4/3, D = 3/2, nu = 2, d(f) = 1/2, z = 1,
and theta = 1. This model is related to one-dimensional anisotropic in
terface depinning in a quenched random medium. Another anisotropic int
erface model, different from the first one in the realization of quenc
hed disorder, is shown numerically to belong to the same universality
class as the first one.