1. International Technology Roadmap for Semiconductors, available at http://www.itrs.net.
2. Ultimate physical limits to computation
3. R. P. Feynman, Plenty Room at the Bottom, American Physical Society meeting at the California Institute of Technology, 1959, available at http://www.its.caltech.edu/∼feynman/.
4. Plenty of Room, Indeed
5. The physical limits of computing