What is nanotechnology?

This article gives a very good description of what is meant by terms such as nanotechnology, nanoscience, and nanobiotechnology, as well as the relation to nanotechnology to other fields of science such as chemistry, biology and quantum mechanics. The author gives examples of what nanotechnology can potentially achieve, what has been done so far with this new technology, and finally summarizes some of the challenges raised by nanotechnology research and development.