MEMS have a tremendous future in replacing the components of many commercial products used today. The medical, wireless (including cellular and network technologies), biotechnology computer, automotive and aerospace industries are only a few that will benefit greatly from MEMS. Furthermore, this enabling technology promises to not only transform most major industries but to create an entirely new categories of products. An almost infinite number of radical applications are possible because of its potential : nearly limitless functionality, infinitesimally small form factor, a phenomenal price / performance ratio, and an architecture that lends itself to mass production, all of which are advantages that drove the success of the integrated circuit. MEMS will be an indispensable factor for advancing technology in the 21st century world.