This paper overviews emerging C&C systems from standpoints of technolo
gy service, and low-power device requirements. First, technology trend
for three major areas of personal communications, personal computer,
and supercomputers, as key-C&C systems technologies for achievement of
a global multimedia service, are discussed. Next, as an essential ele
ment in any C&C system, low-power design considerations for a micropro
cessor are described. Finally, low-power design aspects for CMOS trans
istors, as an essential key-device for LSIs in a microprocessor are co
nsidered.