A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager.PDAs have been mostly displaced by the widespread adoption of highly capable smartphones, in particular those based on iOS and Android.. A PDA has an electronic visual display.Most models also have audio capabilities, …

An intelligent virtual assistant (IVA) or intelligent personal assistant (IPA) is a software agent that can perform tasks or services for an individual based on commands or questions. The term "chatbot" is sometimes used to refer to virtual assistants generally or specifically accessed by online chat.In some cases, online chat programs are exclusively for entertainment purposes.

work? User asks a personal assistant to perform a task. The natural language audio signal is converted into digital data that can be analyzed by the software. Compared with a database of the software using an innovative algorithm to find a suitable answer. This database is located on distributed servers in cloud networks.