Knowledgebase Graphic Design Bookmark Share Facebook Twitter LinkedIn Email User Interface (UI) By Allison LaMotte The User Interface is the means by which a person controls a software application or hardware device, like a computer or mobile phone. People whose job is to design the UI are called UI designers. Learn more: What Are UX and UI Design and How Do They Apply to E-Learning? User Interface Design: 3 Things E-Learning Designers Need to Know