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! Teachers about how teachers could leverage the technology and social media know-how at Yahoo! to support teachers in the classroom. At the 10-day Yahoo! Teachers of Merit program teachers learned how to use all the latest Yahoo! services in an educational instruction: like image-sharing, effective and credible web searching, and making the most of online communities. Participants were also given the opportunity to use the alpha version of Yahoo! Teachers (code named 'Hallpass') and provide feedback to Yahoo! on what features worked and didn't work for them in the classroom. After the participants left for the evening, a group of Yahoo!