If your product is more than a piece of software, please consider sending it to Science/Educational Resources/[relevant topic]. Also, if it is not designed for use in Education, please also send it to Science/[relevant topic] If it bears only upon one of the sciences: For ELECTRONICS: submit to Science/Technology/Education/Products and Services For PHYSICS, CHEMISTRY and ASTRONOMY, you will find @links from the main page of /Science For multidisciplinary and those who sell software in more than one science, you can submit it here.