By Alexei Oreskovic SAN FRANCISCO (Reuters) – Internet companies are no longer limited to the Web browser as they look for new ways to grow their businesses. In recent years, the top Internet companies have increasingly expanded the scope of their activities and ambitions, raising the prospect of exciting new technologies – but also new privacy concerns. Here are some prominent examples of the growing reach of the big Internet players: GOOGLE: Google Inc built its business with its Web search engine, but more than any other Internet company, it has led the way in expanding to new horizons. In February, Google announced plans to acquire Nest, which makes smart thermostats and smoke alarms.