human-computer interaction (HCI), field of computer science that focuses on computer design and user experience, three-tier architecture, architecturethat organises applications intothreelogical and physical computingtiers: the presentationtier, the application tier, and the datatier, interface, means of communication between a human and a computer system with the use of input/output devices and supporting software, interaction, how people need to use the system designed, mobile computing, technology used for transmitting voice and data through small, portable devices anytime and anywhere.

mobile computing key words

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