CrucialTec
 CrucialTec is the world's largest manufacturer of Optical Track Pad (OTP) mobile input devices. Headquartered in Suwon South Korea the company manufactures and supplies OTP devices to handset manufacturers such as Research In Motion Samsung LG HTC Sony Ericsson Motorola and Pantech. CrucialTec is also a supplier of devices for smart TVs and digital cameras to companies like HP Sharp Kyocera and Acer.