A nanorobot (robot built using nanotechnology). A self-replicating nanobot requires mobility, intelligence, and the ability to manipulate its environment. It also needs to know when to stop its own replication.

Articles on that refer to Nanobot

The Law of Accelerating Returns By Ray Kurzweil
Chapter 1: The Evolution of Mind in the Twenty-First Century By Ray Kurzweil
Testimony of Ray Kurzweil on the Societal Implications of Nanotechnology By Ray Kurzweil
Live Forever--Uploading The Human Brain...Closer Than You Think By Ray Kurzweil
Human Body Version 2.0 By Ray Kurzweil
Nanotechnology Dangers and Defenses By Ray Kurzweil
The Human Machine Merger: Why We Will Spend Most of Our Time in Virtual Reality in the Twenty-first Century By Ray Kurzweil
The Web Within Us: Minds and Machines Become One. By Ray Kurzweil
The Drexler-Smalley Debate on Molecular Assembly By Ray Kurzweil
Dear PC: R.I.P. By Ray Kurzweil

News Articles that refer to Nanobot

Nanobots, Real or Imagined
Kurzweil proposes research programs to replace DNA, block bioterror viruses
Nanobots: 'an impossible, childish fantasy'
Nanotech special issue
Glowing nanobots map microscopic surfaces
Nanobots in the brain featured on CBS '48 Hours'
Nanotech-based visualization
Killed by Goo!
PBS 'Quest: Nanotechnology Takes Off' show starts Tuesday
Microbots navigate veins to fight disease