Updates the advancements made in the level of achievable integration of optical circuits and components in the last ten years--highlighting the commercial success of particular devices as well as introducing multiple facets of integrated optics.Commercialization of lithium niobate modulators; requirements for integrated optics devices in communication systems; silica waveguide devices; erbium doped gas waveguide devices; erbium doped lithium niobate waveguide devices; inP-based photonic circuits and components; polymeric thermo-optic digital optical switches; hybrid integration of optical devices on silicon; integrated optics in sensors - advances toward miniaturization; nonlinear integrated optical devices; design and simulation tools for integrated optics.