The !%Optical Society of America%! has launched its Green Photonics Guide, subtitled The Optics and Photonics Industry’s Source for a Sustainable World. The online resource features a power search engine that continually indexes the content of participating suppliers’ Web sites. Users can perform key word-driven or category-specific searches. Among the categories are OCT, image processing, laboratory services, microscopes, spectrometers and fluorescence imaging systems.