The Free On-line Dictionary of Computing (19 January 2023):

nanocomputer

    /nan'oh-k*m-pyoo'tr/ A computer with
   molecular-sized switching elements.  Designs for mechanical
   nanocomputers which use single-molecule sliding rods for their
   logic have been proposed.  The controller for a nanobot
   would be a nanocomputer.

   Some nanocomputers can also be called quantum computers
   because quantum physics plays a major role in calculations.
   Richard P. Feynman is still cited today for his work in this
   area.

   ["Feynman Lectures on Computation", Richard P. Feynman
   (Editor, Author), Robin W. Allen (Editor), Tony Hey (Author)]

   [Jargon File]

   (2008-01-14)


The Jargon File (version 4.4.7, 29 Dec 2003):

nanocomputer
 /nan'oh·k@m·pyoo´tr/, n.

    A computer with mo­lec­u­lar-sized switching elements. Designs for
    mechanical nanocomputers which use single-molecule sliding rods for their
    logic have been proposed. The controller for a nanobot would be a
    nanocomputer.