American scientists <a href="https://en.wikipedia.org/wiki/John_Bardeen" id="mw0w" rel="mw:WikiLink" title="John Bardeen">John Bardeen</a> and <a href="https://en.wikipedia.org/wiki/Walter_Houser_Brattain" id="mw1A" rel="mw:WikiLink" title="Walter Houser Brattain">Walter Houser Brattain</a> observe the basic principles of the <a href="https://en.wikipedia.org/wiki/Transistor" id="mw1Q" rel="mw:WikiLink" title="Transistor">transistor</a>, a key element for the <a href="https://en.wikipedia.org/wiki/Electronics" id="mw1g" rel="mw:WikiLink" title="Electronics">electronics</a> revolution of the <a href="https://en.wikipedia.org/wiki/20th_century" id="mw1w" rel="mw:WikiLink" title="20th century">20th century</a>.