The GUI (Graphical User Interface) was originally created by SRI (Stanford Research Institute). The Interface was applied to the Alto Computer System by Xerox in 1973. In 1979, Steve Jobs and others from Apple were invited to see the Alto and the software that it ran. What Steve Jobs saw, was the future of computing (a graphical interface controlled by a pointing device). Apple immediately incorporated this technology into the Lisa computer, and hired 15 to 20 Xerox scientists to work on the Apple system. So, although Apple is credited with the invention of the GUI AND the mouse (the mouse was invented in 1964 by Douglas Englebart, and was officially called an "X-Y Position Indicator for a Display System"), these technologies were in fact "borrowed" from others.
The Hertz was named for the German physicist Heinrich Rudolph Hertz. Hertz confirmed through experimentation in (1885) of the Electromagnetic Theory, which states that light is a form of electromagnetic radiation, and is propagated as waves.
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