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U

USB (Universal Serial Bus)

A standard method of connecting devices such as keyboards and printers to a computer.

Upload

Transfer a file from your computer to a central computer, e.g. your ISP.

Usability test

Asks users to carry out a set of instructions using a given product.

User interface

The way in which a user interacts with a system such as a computer or mobile phone, e.g. keypad, screens, menu and icons.