About: http://webisa.webdatacommons.org/406035389

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	The Apple II???s sound system, unlike contemporaries such as the Atari 800 or Commodore 64, did not use a discreet sound chip, but rather a simple timer circuit that could be coaxed into creating square-wave tones.
http://www.w3.org/ns/prov#wasQuotedFrom	machineproject.com