Google announced that it would begin combining data gathered on users of over 60 Google products and services, including Gmail, Google+, Youtube, and the Android mobile operating system. Previously, users could use one Google service, such as Google+, without having their information combined with that gathered from other services, such as Youtube. Users cannot opt out of having their data combined unless they avoid signing into their user accounts or stop using Google’s services altogether. Google’s changes come after the company began surfacing personal information from Google+ in Google search results, a move that EPIC said raised privacy and antitrust issues. In 2010, EPIC, along with other privacy groups, wrote a letter to Google over the company's decision to combine user data among 12 Google services. Google is subject to a settlement with the Federal Trade Commission that establishes new privacy safeguards for users of all Google products and services and subjects the company to regular privacy audits. For more information, see EPIC: Federal Trade Commission and EPIC: Google Search.