user interface

US /ˈjuːzər ˈɪntərfeɪs/
UK /ˈjuːzər ˈɪntərfeɪs/
"user interface" picture
1.

the means by which the user and a computer system interact, in particular the use of graphical displays, menus, and movable icons rather than text typed commands

:
The new software has a very intuitive user interface.
Good user interface design is crucial for user satisfaction.