Hand code data collector (Bar code Hand Terminal), also known as inventory machine, handheld computer. It integrates barcode scanning devices, RFID technology and data terminals, with terminal computer devices with batteries that can be operated offline. With real-time acquisition, automatic storage, real-time display, real-time feedback, automatic processing, automatic transmission. Provides assurance for the authenticity, effectiveness, real-time, and availability of field data. It has the characteristics of integrity, mobility, small size, light weight, high performance, and is suitable for handheld use.