1) Class of computer 
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.) The term nanocomputer is increasingly used to refer to general computing devices of size comparable to a credit card. The.....
A computer made from components (mechanical, electronic, or otherwise) built at the nanometre scale.
A computer with parts built on a molecular scale