A computer made from components (mechanical, electronic, or otherwise) on a nanometer scale.

A defensive system with built-in constraints to limit or prevent its offensive use.

Organic molecules that are the building blocks of proteins. There are some two hundred known amino acids, of which twenty are used extensively in living organisms.

Chemicals that protect against oxidation, which causes rancidity in fats and damage to DNA.

A field of research that aims to understand and build intelligent machines; this term may also refer to an intelligent machine itself.

A molecular machine that can be programmed to build virtually any molecular structure or device from simpler chemical building blocks. Analogous to a computer-driven machine shop. (See Replicator

The smallest particle of a chemical element (about three ten-billionths of a meter in diameter). Atoms are the building blocks of molecules and solid objects; they consist of a cloud of electrons surr [..]

The use of computers to perform engineering design, ultimately generating detailed designs from broad specifications with little or no human help. Automated engineering is a specialized form of artifi [..]

One-celled living organisms, typically about one micron in diameter. Bacteria are among the oldest, simplest, and smallest types of cells.

One-celled living organisms, typically about one micron in diameter. Bacteria are among the oldest, simplest, and smallest types of cells.