Personal Digital Assistant http://www.snik.eu/ontology/bb/PersonalDigitalAssistant meta:chapter bb:chapter6-6↪ Physical Tool Layer: Physical Data-Processing Systems rdf:type meta:EntityType↪ entity type rdfs:label Personal Digital Assistant @en دستیار شخصی دیجیتال @fa rdfs:subClassOf bb:Client↪ Client bb:MobileComputer↪ Mobile Computer bb:PhysicalDataProcessingSystem↪ Physical Data Processing System skos:closeMatch dbr:Personal_Digital_Assistant inverse relations is ov:defines of sniko:bb↪ Health Information Systems Ontology