PDA（Personal Digital Assistant), Also known as the handheld computer, it can help us to complete the work, study, entertainment and so on in mobile. According to the use, it can be divided into industrial grade PDA and consumer product PDA.
Industrial-grade PDA is mainly used in the industrial field. The common ones are bar code scanner, RFID reader, POS machine, etc. They can be called PDA. Consumer PDA includes more, such as smart phones, tablets, hand-held game machines, etc.
PDA（Personal Digital Assistant), It means a personal digital assistant. As the name implies, it is a digital tool to assist personal work. It mainly provides the functions of note keeping, address book, business card exchange and itinerary arrangement.