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:
History of Yahoo! community webjay in January 2009. Yahoo! Next is an incubation ground for future Yahoo! technologies currently in their beta testing phase, similar to Google Labs. It contains forums for Yahoo! users to give feedback to assist in the development of these future Yahoo! technologies. In early 2006, Yahoo! offered users the chance to beta test a new version of the Yahoo! homepage. However, it currently only supports Internet Explorer and Mozilla Firefox. Users of other browsers, such as Opera, have criticized Yahoo! for this move. Yahoo! says they intend to support additional browsers in the future. On August 27, 2007,