Glossary for Geospatial Science

erasable optical drive or EO drive:  A 5 1/4" high capacity storage device that uses removable double-sided cartridges which typically store between 300 and 500 megabytes per side.  EO drives are similar to WORM drives, with the difference that EO cartridges can be erased and re-used, while data on WORM disks is permanent and cannot be erased.  (See also: WORM drive.)