Microscopy Society of the Ohio River Valley: http://www.msorv.org/index.html MSORV is a local affiliated society of both the Microscopy Society of America (MSA) and the Microanalysis Society (MAS). This local society has members throughout Ohio, focusing on the Columbus - Cincinnati - Dayton region but also reaches to Indianapolis, Indiana, and the Northern Kentucky area.Microscopy Society of America: http://www.microscopy.org/ A non-profit organization dedicated to the promotion and advancement of the knowledge of the science and practice of all microscopical imaging, analysis and diffraction techniques useful for elucidating the ultrastructure and function of materials in diverse areas of biological, materials, medical and physical sciences. Histochemical Society (http://histochemicalsociety.org/) An organization dedicated to the development and use of visual techniques that provide biochemical and molecular information about the structure and function of cells, tissues and organs and for the dissemination of this knowledge through education and outreach. This site provides access to the contents of the Journal of Histochemistry & Cytochemistry which publishes new developments in microscopy and imaging among other topics. Fluorescence Spectra Viewers: UofA: http://spectra.arizona.edu/ A comprehensive spectra database hosted at the University of Arizona. Life Technologies: http://www.lifetechnologies.com/us/en/home/life-science/cell-analysis/labeling-chemistry/fluorescence-spectraviewer.html Check the spectral compatibility for many fluorophores sold by Invitrogen and Molecular Probes. This viewer also has spectra for many common dyes. BD Biosciences: http://www.bdbiosciences.com/research/multicolor/spectrum_viewer/index.jsp A spectraviewer especially useful for checking spectra for common flow cytometry dyes.