(Telecompaper) Incoming Google CEO Sundar Pichai said that 400 million users have started using the Android OS since May 2014, bringing the total of active users to 1.4 billion, the Wall Street Journal reported. Pichai said most of the recent growth in Android took place is in emerging economies such as Indonesia and Vietnam. In those two countries, the number of Android users has doubled in a year, pushed by first-time smartphone users. Pichai also reported user growth from other Google devices. About 30,000 new Chromebooks are being activated each day, mostly in US schools, he said. He said that more than 10,000 companies are testing or using Android for Work, a version of the operating system aimed at businesses. Pichai, Google's senior vice president for products, is scheduled to become CEO of Google's core search-and-advertising unit when the company reorganizes as Alphabet later this year.