Human Computer Interaction

Fitts’s Law is a predictive model of human movement that helps startup founders optimize product usability by balancing target size and distance to improve user efficiency and reduce friction.

Miller’s Law suggests humans can hold seven plus or minus two items in short term memory, a critical concept for founders designing products or internal systems.

User Interface (UI) is the bridge between human and machine. This guide defines UI, contrasts it with UX, and explores its practical application for startup founders.