> lots of people thought all their windows and console programming knowledge is gone, next was apps and iphone when people thought all their knowledge of web pr

> lots of people thought all their windows and console programming knowledge is gone, next was apps and iphone when people thought all their knowledge of web programming is gone Those were gentle transitions. Probably the biggest was from mainframe to PC. I was in a team of designers in the early 90s and found I was the only one who could think in terms of user interaction instead of a basically linear flow. I had worked on getting to grips with it.