Magneto optical cartridges have magneto optical disks embedded in them. The magneto optical disk or media is a lot like CD-ROMs in that the method of reading and writing is pretty similar. The disc consists of a ferromagnetic material sealed beneath a plastic coating, thus there is never any physical contact while reading or writing. The magneto optical disks are available in W.O.R.M (Write Once Read Many) and rewritable forms. The W.O.R.M form of the magneto optical disk allows businesses to store information reliably as information cannot be erased once it has been written. Rewritable forms work while writing in a methodology similar to magnetic diskettes. An additional information check pass is done after the information has been written over the MO (Magneto Optical) disk to ensure integrity. The technology was first introduced in the late 1980s and is usually available in capacities ranging from 100 MB to 5.2 GB. We offer MO disks by HP, Sony and Verbatim. Magneto optical disk drives can have a variety of uses, not only can they be used for your data backup needs, they can also be employed to, for example, handle computer graphics for Web Servers and can MO disks can also be easily connected on a network server to store and share data.