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In today's part of our regular return to the past, after some time we will talk about Apple again. This time we will remember the day when the first public version of the Mac OS X 10.0 Cheetah operating system saw the light of day - it was the year 2001. The second event that we will remember in today's article is of a slightly older date - on March 24, 1959, the first functional integrated circuit.

Jack Kilby and the Integrated Circuit (1959)

On March 24, 1959, Texas Instruments demonstrated the first integrated circuit. Its inventor, Jack Kilby, created it to prove that the operation of resistors and capacitors on a single semiconductor is possible. Built by Jack Kilby, the integrated circuit was on a germanium wafer measuring 11 x 1,6 millimeters and contained only a single transistor with a handful of passive components. Six years after the introduction of the integrated circuit, Kilby had it patented, and in 2000 he received the Nobel Prize for Physics.

Mac OS X 10.0 (2001)

On March 24, 2001, the first public version of the Apple desktop operating system Mac OS X 10.0, codenamed Cheetah, was released. Mac OS X 10.0 was the first major addition to the Mac OS X family of operating systems and also the predecessor to Mac OS X 10.1 Puma. The price of this operating system at the time was $129. The aforementioned system was particularly famous for its huge differences compared to its predecessors. Mac OS X 10.0 Cheetah was available for the Power Macintosh G3 Beige, G3 B&W, G4, G4 Cube, iMac, PowerBook G3, PowerBook G4, and iBook computers. It featured elements and functions such as Dock, Terminal, native e-mail client, address book, TextEdit program and many others. In terms of design, the Aqua interface was typical for Mac OS X Cheetah. The last version of this operating system - Mac OS X Cheetah 10.0.4 - saw the light of day in June 2001.

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