History can involve studying one people, culture, or country in particular, but it also often involves general overviews of broad trends. Students of history may be required to conduct research in a specific topic.

Hong Kong is one of the two Special Administrative Regions of the People's Republic of China, the other being Macau.

The PhD is a doctoral degree, specifically called a "doctor of philosophy" degree. This is misleading because PhD holders are not necessarily philosophers (unless they earned their degree in philosophy!). That said, PhD recipients are able to engage in thought experiments, reason about problems, and solve problems in sophisticated ways.