By taking this approach, Apple bent all the rules of disruption. To disrupt yourself, for example, Professor Christensen’s research would typically prescribe setting up a separate company that eventually goes on to defeat the parent. It’s incredibly hard to do this successfully; Dayton Dry Goods pulled it off with Target. IBM managed to do it with the transition from mainframes to PCs, by firewalling the businesses in entirely different geographies. Either way, the number of companies that have successfully managed to do it is a very, very short list. And yet Apple’s doing it to itself right now with the utmost of ease. Here’s new CEO Tim Cook, on the iPad disrupting the Mac business: “Yes, I think there is some cannibalization… the iPad team works on making their product the best. Same with the Mac team.” It’s almost unheard of to be able to manage disruption like this.