The quality of being user-friendly.

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

plural of wheelchair user

Alternative spelling of user-friendly

Difficult to use, especially for an untrained user.

plural of end user

Agent noun of re-use; one who re-uses.

plural of re-user

(graphical user interface) A control created by a developer, usually by combining other controls, often intended for use in a specific application.

(computing) A set of users grouped together on a system for administrative purposes. / (computing) A community of users of a particular machine, operating system, etc.