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
Guido Schmidt-Chiari received his PhD in law from the University of Vienna. In 1957 Guido Schmidt-Chiari worked for the Belgian-American Banking Corporation in New York City. In 1958 he began work at Creditanstalt in Vienna, in 1971 he was appointed to the Executive Board and further promoted to CEO in 1988. After the Fall of the Iron Curtain Schmidt-Chiari initiated the expansion of Creditanstalt into Central European countries. Following the acquisition of Creditanstalt by Bank Austria Schmidt-Chiari resigned in 1997. Under the direction of Guido Schmidt-Chiari, the Creditanstalt Group grew manifold and saw net profit after tax grow from 1.2 billion ATS