Catom

Catoms, or Claytronic Atoms, are also referred to as 'programmable matter'. Catoms are described as being similar in nature to a nanomachine, but with greater power and complexity. While microscopic individually, they bond and work together on a larger scale. Catoms can change their density, energy levels, state of being, and other characteristics using thought alone.

A form of Catoms were developed on Earth to change telepresence, presumably to enhance it, however, the work was scrapped following the Third World War. The crew of the Columbia (NX-02) encountered the Caeliar in 2168. (Destiny: Gods of Night)