SEM can refer to: SAP Strategic Enterprise Management Scanning electron microscope School of Science and Engineering (known as the Science and Engineering Magnet, SEM) at the Yvonne A. Ewell Townview Magnet Center, Dallas, Texas Search engine marketing Security Event Manager Single European Market Sistema Eléctrico de Magallanes, a power grid in Chile Smooth endoplasmic reticulum (in biochemistry an organelle in cells) Society for Ethnomusicology Space Experiment Module (related t… (More on Sem)