On August 24, 2011, Steve Jobs resigned from his position as CEO with Tim Cook taking his place. On October 29, 2012, Apple announced structural changes to increase collaboration between hardware, software, and services. This involved the departure of Scott Forstall, responsible for the launch of iOS (iPhone OS at the time of launch), who was replaced with Craig Federighi as head of iOS and OS X teams. Jony Ive became head of HI (Human Interface), whilst Eddy Cue was announced as head of online services including Siri and Maps. The most notable short term difference of this restructuring was the launch of iOS 7, the first version of the operating system to use a drastically different design to its predecessors, headed by Jony Ive., followed by OS X Yosemite a year later with a similar design.