About: http://webisa.webdatacommons.org/64167267

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	FIG. 3 is a schematic illustration of a photo-optical switch matrix including the taps and key pads effectively forming a key switch array for a keyboard;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com