What board holds microchips or integrated circuits and the circuitry that connects these chips?

A: two types on a experimental type is called breadboard on a functional circuit is called mother board

The board that holds microchips and electronic circuity is called a printed circuit board (PCB). More information: http://en.wikipedia.org/wiki/Printed_circuit_boardI do not agree with the above...

PCB stripboard

2 memory Modules (C)

Mostly silicon but other compounds such as gallium arsenide are also used.