Magneto-optical:

A technology hybrid, magneto-optical storage systems combine the
attributes of both digital storage formats.  Like an optical
system, the magneto-optical disk can efficiently store massive
volumes of data on a removable cartridge.  Data is stable, with
the danger of head crashes diminished by the use of laser
readers that never touch the surface of the disk.  A magnetic
coil is a component part of the data recording process, enabling
the data track to be erased and reused.  Advances in both the
magnetic and optical technologies promise to decrease costs,
improve data access times, and increase the capacities of the
magneto-optical medium.

<ffile41>   Data Storage
<ffile45>   Optical