(computing) The desired, expected, or actual experience of a user interacting with a product, especially as it relates to the design of the product's user interface.

Difficult to use, especially for an untrained user.

A person who is injured or disabled and uses a wheelchair, usually long-term.

Alternative form of user guide.

A potential bias in epidemiologic studies, involving the fact that subjects who voluntarily enroll in a clinical trial and actually follow the experimental regimen are likely to be healthier than the general population.

(computing, slang) An unspecified person or user on a computer network.

plural of healthy user bias

(computer games) A text-based online game in which players enter instructions on a command line to jointly engage in role-playing. MUDs are a precursor to the massively multiplayer online game.

(computing, dated) A graphic symbol defined by the user, replacing one of the text characters in the computer's character set.

plural of character user interface