The Overview of ZEC(Zero Effort & Connected) UI/UX Strategy: HCI 3.0 & UX 2.0 ZEC(Zero Effort & Connected) MMI(Man Machine Interface) HCI(Human Computer Interface) HCI(Human Computer Interaction) Thing IoT(Internet of Thing) IoE(Internet of Everything) Culture Eco-system design Embodied cognition Context UI(User Interface) UX(User eXperience) Strategy HCD(Human-Centered Design) UCD(User-Centered Design) ACD(Activity-Centered Design) GDD(Goal-Driven Design (Persona & Scenario design)) CCD(Collaboration-Centered Design (Agile UX)) MCD(Metrics-Driven Design (Lean UX)) Methodology