Orthographic conventions have varied over time, and vary by publishers, authors, and regional preferences, on whether and when Internet should be capitalized. When the Internet first came into common use, most publications treated Internet as a capitalized proper noun, but this has become less common. This reflects the tendency in English to capitalize new terms and move them to lowercase as they become familiar. The word is sometimes still capitalized to distinguish the global IP-based Internet from internets that are smaller or not IP-based, though many publications, including the AP Stylebook since 2016, recommend the lowercase form in every case. In 2016, the Oxford English Dictionary found that, based on a study of around 2.5 billion printed and online sources, "Internet" was capitalized in 54% of cases, with Internet being preferred in the United States and internet being preferred in the United Kingdom.