Table of Contents

Introduction; Manifolds and G-Structures; Geometry and Discrete Groups; Topology of Orbifolds; Topology of 2-Orbifolds; Geometry of Orbifolds: Geometric Structures on Orbifolds; Deformation Spaces of Hyperbolic Structures on 2-Orbifolds; Deformation Spaces of Real Projective Structures on 2-Orbifolds.