The "stuff" out of which we make systems.

Integrated Circuits (ICs) -

CL, state elements, analog interfaces.

Printed Circuits (PC) boards -

substrate for ICs and interconnection, distribution of CLK, Vdd, and GND signals, heat dissipation.

Power Supply -

Converts line AC voltage to regulated DC low voltage levels.

Chassis (rack, card case, ...) -

holds boards, power supply, provides physical interface to user or other systems.

Connectors and Cables.

ICs

	Primarily Crytaline Silicon 1mm - 20mm on a side 100 - 100M transistors (25 - 25M "gates") 3 - 10 conductive layers
2000 - min feature size ~ 0.18um = 0.18 x 10-6 m	CMOS most common - complementary metal oxide semiconductor