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! the transaction completed in one month. The company also announced plans to open a San Francisco office in July 2013. On August 2, 2013, Yahoo acquired Rockmelt; its staff was retained, but all of its existing products were terminated. Data collated by comScore during July 2013 revealed that more people in the U.S. visited Yahoo websites during the month than Google; the occasion was the first time that Yahoo outperformed Google since 2011. The data did not count mobile usage, nor Tumblr. On December 12, 2014, Yahoo! completed the acquisition of video advertising provider BrightRoll for $583 million. On November