Synergy User Manual and Tutorial. - THE CORE MEMORY

Synergy User Manual and Tutorial
In 1911, while studying the effects of extremely cold temperatures on metals such as
mercury and lead, physicist Heike Kamerlingh Onnes discovered that they lost all
resistance at certain low temperatures just above absolute zero. This phenomenon is
known as superconductivity. In 1915, another physicist, Manson Benedicks, discovered
that alternating current could be converted to direct current by using a germanium crystal,
which eventually leads to the use of microchips. In 1919, U.S. physicists William Henry
Eccles (1875 - 1966) and F.W. Jordan () invented the flip-flop, the first electronic
switching electric circuit, which was critical to high-speed electronic counting systems.
The flip-flop is a digital logic hardware circuit that can switch or toggle between two
states controlled by its inputs, which is similar to a one-bit memory. The three common
types of flip-flop are: the SR flip-flop, the JK flip-flop and the D-type flip-flop (shown
below).
In 1925, Vannevar
Bush (1890 - 1974)
developed the first
analog computer to
solve differential
equations. These
analog computers
were mechanical
devices that used
large gears and other
mechanical parts to
solve equations. The
first working machine
was completed in
1931 (left). In 1945,
he published an
article in the Atlantic Monthly called, "As We May Think, which described a theoretical
device called a memex. This device uses a microfilm search system, which is very
similar to hypertext, using a concept that he called associative trails. His description of
the system is:
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