"USA" . . "Channel 2000 description and findings of a Viewdata test conducted by OCLC in Columbus, Ohio, October-December 1980"@en . . "Channel 2000 project report"@en . . . "Channel 2000 : description and findings of a viewdata test conducted by OCLC in Columbus, Ohio" . . . . . . . . . . . . "Channel 2000 : description and findings of a Viewdata test conducted by OCLC in Columbus, Ohio, October-December 1980" . . . "Optisk teknologi" . . "OCLC." . . "OCLC" . "Viewdata (Data transmission system)" . . "Telekommunikation" . . . . "Forsøg" . .