Today in Tech History – August 12

1877 – Thomas Edison sketched his idea for the phonograph, and may have even completed a model. The first working model wasn’t completed until December 6.

1960 – First Communication Satellite Launched
          Echo 1, the world’s first communication satellite is launched. Technically, Echo 1 was passive reflector, as communication signals were bounced off it rather than retransmitted as modern satellites do today. 

1977 – The space shuttle Enterprise carried out its first free flight test, when the orbiter was released from the back of a 747 in flight.

1981 – IBM Introduced Personal Computer
          IBM introduces its Personal Computer (PC) also known as the IBM Model 5150, lending legitimacy to microprocessor-based computers. IBM’s first PC ran with a 4.77 MHz Intel 8088 microprocessor and used Microsoft’s MS-DOS operating system. In 1983, Compaq Computer Corp. released the first clone of the IBM PC, a machine embodying an identical copy of the PC architecture – which IBM had made publicly available – and beginning the gradual decline of IBM’s share of the personal computer market.
The PC architecture, based on Intel’s x86 microprocessor family, continues to dominate desktop computing with over 85% of PCs using an x86-based CPU.

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