There is a growing understanding that the progress of the conventional
silicon technology will reach its physical, engineering and economic
limits in near future. This fact, however, does not mean that progress
in computing will slow down. What will take us beyond the silicon era
are new nano-technologies that are being pursued in university and
corporate laboratories around the world. In particular, molecular
switching devices and systems that will self-assemble through molecular
recognition are being designed and studied. Many labora- tories are now
testing new types of these and other reversible switches, as well as
fabricating nanowires needed to connect circuit elements together. But
there are still significant opportunities and demand for invention and
discovery be- fore nanoelectronics will become a reality. The actual
mechanisms of transport through molecular quantum dots and nanowires are
of the highest current ex- perimental and theoretical interest. In
particular, there is growing evidence that both electron-vibron
interactions and electron-electron correlations are impor- tant. Further
progress requires worldwide efforts of trans-disciplinary teams of
physicists, quantum chemists, material and computer scientists, and
engineers.