MBM - Magnetic Bubble Memory Memory devices where data are stored in a special array of magnetic domains. Can be thought of as a stationary disk with spinning bits.
Bubble memory is well suited to rugged applications especially military.
It has the further security advantage that data can be erased completely very fast. It is about as fast as a slow hard disk and holds its content without power. MCI - Media Control Interface Multimedia extensions in MS Windows. This packaging method saves space and speeds up processing due to the shortened leads between chips. This is a workable solution to wafer scale integration.