<P> Later , viewers began to dispute the accuracy of the question because of information on the Internet that indicated Post-It Notes were `` launched '' or `` introduced '' under the name `` Press ' N Peel '' in four cities in 1977 , based on an interview with the inventors of the Post-It Note published in the Financial Times . On April 6 , 1980 , the product debuted in US stores as `` Post-It Notes . '' The Sony Walkman went on sale in Japan on July 1 , 1979 , and was later introduced to the US in June 1980 . </P>
<P> Later , viewers began to dispute the accuracy of the question because of information on the Internet that indicated Post-It Notes were `` launched '' or `` introduced '' under the name `` Press ' N Peel '' in four cities in 1977 , based on an interview with the inventors of the Post-It Note published in the Financial Times . On April 6 , 1980 , the product debuted in US stores as `` Post-It Notes . '' The Sony Walkman went on sale in Japan on July 1 , 1979 , and was later introduced to the US in June 1980 . </P>
when was sony walkman first sold in stores
when was sony walkman first sold in stores
the US in June 1980
the US in June 1980