plural of user guide

(chiefly computing) Not helpful to users; difficult for an untrained person to use.

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

plural of wheelchair user

plural of user-defined function

plural of user-defined graphic

plural of graphical user interface

(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.

plural of multi-user dungeon

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