About: http://webisa.webdatacommons.org/188830711

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	So, such an optical system is put into practical use as read only memories such as compact discs and video discs and re-writable optical memories such as magneto-optical discs.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com