<a href="https://en.wikipedia.org/wiki/Sony" id="mwAXE" rel="mw:WikiLink" title="Sony">Sony</a> introduces the <a href="https://en.wikipedia.org/wiki/Betamax" id="mwAXI" rel="mw:WikiLink" title="Betamax">Betamax</a> <a href="https://en.wikipedia.org/wiki/Videocassette_recorder" id="mwAXM" rel="mw:WikiLink" title="Videocassette recorder">videocassette recorder</a>.<sup about="#mwt247" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-45"}}' id="cite_ref-45" rel="dc:references" typeof="mw:Extension/ref"><a href="./May_10#cite_note-45" id="mwAXQ" style="counter-reset: mw-Ref 45;"><span class="mw-reflink-text" id="mwAXU">[45]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-45"><cite about="#mwt244" class="citation book cs1" id="CITEREFGomeryPafort-Overduin2011">Gomery, Douglas; Pafort-Overduin, Clara (2011). <a class="external text" href="https://books.google.com/books?id=5i-tAgAAQBAJ&amp;pg=PT925" id="mwB_Q" rel="mw:ExtLink nofollow"><i id="mwB_U">Movie History: A Survey: Second Edition</i></a>. Routledge. p.<span id="mwB_Y" typeof="mw:Entity"> </span>925. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwB_c" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwB_g" typeof="mw:Entity"> </span><a href="./Special:BookSources/978-1-136-83524-7" id="mwB_k" rel="mw:WikiLink" title="Special:BookSources/978-1-136-83524-7"><bdi id="mwB_o">978-1-136-83524-7</bdi></a>.</cite><span about="#mwt244" class="Z3988" id="mwB_s" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Movie+History%3A+A+Survey%3A+Second+Edition&amp;rft.pages=925&amp;rft.pub=Routledge&amp;rft.date=2011&amp;rft.isbn=978-1-136-83524-7&amp;rft.aulast=Gomery&amp;rft.aufirst=Douglas&amp;rft.au=Pafort-Overduin%2C+Clara&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D5i-tAgAAQBAJ%26pg%3DPT925&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMay+10"></span></span>