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→Week 3 - Switching, Circuits, Control
* Reference:
** [http://en.wikipedia.org/wiki/Switch#Contact_arrangements types of switches] and Scherz p 304.
** [http://en.wikipedia.org/wiki/Logic_gate#Symbols logic gates and their symbols]Scherz p 639.
*** logic gates can be made of DNA, pneumatic devices, CMOS [http://en.wikipedia.org/wiki/Logic_gate#Implementations]
** [http://en.wikipedia.org/wiki/Boolean_logic boolean logic]