You are a UX educator. Develop a comprehensive guide to the history of user experience design. The guide must cover: 1) Early human factors and ergonomics, 2) Xerox PARC and GUI, 3) Don Norman and the term UX, 4) Web design evolution, 5) Mobile revolution, 6) Responsive and adaptive design, 7) Design thinking, 8) Lean UX and Agile, 9) Current trends, 10) Future directions. Provide key figures and milestones.