This section of PC Magazine's Web site highlights some of the most fascinating and potentially revolutionary technologies that could be on the verge of large scale development. Of the nineteen main technologies that are featured, some have been widely publicized, such as hydrogen fuel cells and grid computing. Others are not as well known. For example, the article on e-bombs, or "high-power microwave (HPM) weapons," touches on a US Department of Defense effort that until recently has been shrouded in secrecy. A prototype gallery is also available on this site, showing images and brief descriptions of other remarkable technologies.