What does HR stand for?

Context:

This "job offer" touched off a firestorm on Chinese blogosphere. No one believed that Prof. George would actually write such a letter. It is full of Chinglish, very unprofessional, and displays an ignorance of US labor laws and HR practices. Furthermore, salaries of all faculty members of state universities are posted online, and people looked them up. There is not a single person on the faculty of MUSC whose salary is over $400k/year. Poor Prof. George was immediately bombarded by email inquiries about this letter, and he finally responded with the following :

More:

http://www.dailykos.com/story/2011/02/19/947221/-Science,-deception,-and-China:-A-bizarre-case-of-a-job-offer-that-wasnt