. J UNCTION T RANSISTOR The credit of inventing the transistor in the year goes to J. Bardeen and W.H. Brattain of Bell Telephone Laboratories, U.S.A.
That transistor was a point-contact transistor. The first junction transistor consisting of two back-to-back p-n junctions was invented by William Schockley in . As long as only the junction transistor was known, it was known simply as transistor. But over the years new types of transistors were invented and to differentiate it from the new ones it is now called the Bipolar Junction Transistor (BJT).
Even now, often the word transistor