Nanocomputer is the logical name for a computer smaller than the microcomputer, which is smaller than the minicomputer. (The minicomputer is called "mini" because it was a lot smaller than the original (mainframe) computers.) More technically, it is a computer whose fundamental parts are no bigger than a few nanometers. For comparison, the smallest part of current state-of-the-art microprocessors measures 45 nm as of February 21, 2007[1]. No commercially available computers that are named nanocomputers exist at this date, but the term is used in science and science fiction.

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Information processor whose overall dimensions are less than 100 nm.

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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.

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Computer whose characteristic length scale is between 10-7.5 and 10-10.5 meters (i.e., between 32 and 0.32 nm, i.e., closer to 1 nanometer than to 1 micrometer or 1 picometer on a logarithmic scale).

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A computer built using nanotechnology (manufacturing to molecular specifications). A lower bound on nanocomputing speeds has been set by calculating the speed of an acoustic computer using "rod logics" and messages that travel at the speed of sound; a one-kilogram rod logic, occupying one cubic centimeter, can contain 10^12 cpus each operating at 1000 MIPS for a total of ten thousand billion billion operations per second. Note that rod logics are the nanotech equivalent of vacuum tubes; electronic nanocomputers would be substantially faster. [K. Eric Drexler, Engines of Creation, 1986]

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A computer with parts built on a molecular scale.

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A computer made from components (mechanical, electronic, or otherwise) built at the nanometer scale. These computers could be many orders-of-magnititude faster than today's, which enables software to take proportional leaps.

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A computer made from components (mechanical, electronic, or otherwise) built at the nanometre scale.

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A computer made from components (mechanical, electronic, or otherwise) built at the nanometer scale.

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A computer made from components (mechanical, electronic, or otherwise) built at the nanometre scale.

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