Larry Page using Android software and, by 2010, 17.2% of the handset market consisted of Android sales, overtaking Apple for the first time. Android became the world's most popular mobile operating system shortly afterward. Following a January 2011 announcement, Page officially became the chief executive of Google on April 4, 2011, while Schmidt stepped down to become executive chairman. By this time, Google had over $180 billion market capitalization and more than 24,000 employees. After Schmidt announced the end of his tenure as CEO on January 20, 2011, he jokingly tweeted on Twitter: "Adult-supervision no longer needed." Quartz organizational management reporter, Max
Howard Schmidt be stepping down as the White House's CyberSecurity Coordinator at the end of the month, citing a desire to focus on family and pursue teaching in the cyber field. He was replaced by Michael Daniel, chief of the White House budget office's intelligence branch. Schmidt also had an active career in private industry and professional organizations. In 1997, Schmidt joined Microsoft, as the director of information security, chief information security officer (CISO), and chief security officer (CSO). He was the co-founder of the Trustworthy Computing Security Strategies Group. Schmidt served on the Executive Committee of the Information Technology Sector Coordination