minicomputer

A mid-sized computer, usually fitting within a single cabinet about the size of a refrigerator, that has less memory than a mainframe.

a mid-sized digital computer; at any given point in the development of computer technology, a minicomputer will be faster and have greater capacity than a microcomputer, but will be slower and have less capacity than a mainframe computer.

A computer smaller than a mainframe, but larger than a microcomputer.

a digital computer of medium size