U.S.SENSOR
UBIQ
U-BLOX
UDOO
ULEADTEK勇领
ULNION
Uniband Electronic Corp(UBEC)
Unichip
UNICMICRO
Unicon
Unigen
UniOhm
Union
Uniroyal Electronics
Unisonic Technologies Co Ltd(UTC)
United Chemi-Con(UCC)
Universal Electronics Inc. (UEI)
UPI
US Digital
US-Laser