SiRF 's technology has been integrated into a wide range of mobile consumer devices such as automobile navigation and telematics systems , portable navigation devices ( PNDs ) , mobile phones , mobile computers , mobile internet devices , handheld and wearable GPS recreational devices , digital cameras and camcorders , mobile gaming devices , child and pet trackers , and GPS-based peripherals , as well as into commercial applications such as logistics management systems , enterprise and carrier LBS servers , asset tracking devices , and fleet management systems .