<http://webisa.webdatacommons.org/prov/408368315> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/176147850> . <http://webisa.webdatacommons.org/prov/151867086> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/176147850> . <http://webisa.webdatacommons.org/176147850> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/176147850> <http://www.w3.org/ns/prov#value> "For example, GroundWork Open Source Inc., a San Francisco-based open source network management company, said an independent study confirmed that over the course of three years its equipment was 87% less expensive than proprietary products when factoring in purchase, installation, licensing and other costs." . <http://webisa.webdatacommons.org/176147850> <http://www.w3.org/ns/prov#wasQuotedFrom> <techtarget.com> .