7 Essential UI Design Principles for an Effective User Interface
User experience (UX) and user interface (UI) design date back to the very first inventions—when a prehistoric human first attached a rock to a stick, they made the stone easier to swing (and hopefully got a promotion in the process). As a coherent discipline, though, UI was codified in the 1970s at companies like Xerox and popularized in the 1990s with the wider adoption of the home computer.





