Google data centers in late 2013 and began selling off the barges in 2014. Most of the software stack that Google uses on their servers was developed in-house. According to a well-known Google employee, C++, Java, Python and (more recently) Go are favored over other programming languages. For example, the back end of Gmail is written in Java and the back end of Google Search is written in C++. Google has acknowledged that Python has played an important role from the beginning, and that it continues to do so as the system grows and evolves. The software that runs the Google infrastructure includes:
Yahoo! January 2014 after Mayer, who initially hired him after her appointment as CEO, dismissed him. De Castro, who previously worked for Google and McKinsey & Company, was employed to revive Yahoo's advertising business. Yahoo offers a multi-lingual interface. The site is available in over 20 languages. The official directory for all of the Yahoo International sites is "world.yahoo.com". The company's international sites are wholly owned by Yahoo, with the exception of its Japan and China sites. Yahoo holds a 34.75% minority stake in Yahoo! Japan, while SoftBank holds 35.45%, Yahoo!Xtra in New Zealand, which Yahoo!7 have 51% of and 49%