molecular biology and genetics (8th); neuroscience and behavior (6th); pharmacology and toxicology (5th); and psychiatry and psychology (8th). Departmental rankings in the global top 20 according to the Academic Ranking of World Universities (ARWU) for 2015 include chemistry (18th); computer science (14th); and economics/business (19th). Since introduced in 2017, the ARWU Subject Rankings has ranked mechanical engineering at UC San Diego as the top (1st) public university program in the US (2017–2020). Mechanical engineering at UC San Diego has also consistently ranked as a top 5 US overall and a top 10 program worldwide since the introduction of subject rankings by ARWU. Departmental rankings in the global top 20 according to the QS World University Rankings for 2015 include earth and marine sciences (13th); biological sciences (14th); economics and econometrics (18th); and pharmacy and pharmacology (20th). Additional rankings within the global top 40 include politics and international studies (21st); medicine (22nd); mathematics (28th); linguistics (31st); and electrical engineering (34th).ScienceWatch placed UC San Diego 1st in social psychology, 2nd in oceanography, 3rd in international relations, 5th in molecular biology and genetics, 17th in engineering, and 18th in Neuroscience and Behavior using non-survey, quantitative based metrics to determine research impact.The Hollywood Reporter has ranked UC San Diego's graduate theatre program among the top ten drama schools in 2016 (6th), 2017 (5th), 2018 (4th), 2019 (3rd), 2020 (3rd), and 2021 (5th) also ranking the undergraduate theatre program as one of the top five in the nation in 2018.25 Best Drama Schools for an Acting Degree , The Hollywood Reporter, Retrieved May 26, 2017 Admissions UC San Diego is categorized by U.S. News & World Report as "most selective" for college admissions ratings within the United States. For the Fall 2018 admissions cycle, the school received 118,372 applications from both freshman and transfer applicants, the second highest among the University of California campuses. Of those 118,372 applications, 97,899 applications were from prospective freshman with UC San Diego granting admission to just 29,577 applicants giving the institution an acceptance rate of 30.2% for the fall 2018 admission cycle. In 2009, UC San Diego mistakenly sent Admit Day welcome emails to all its 47,000 freshmen applicants, instead of just the 17,000 who had been admitted. However, school officials quickly realized the mistake and sent an apology email within two hours. Graduate admissions are largely centralized through the Office of Graduate Studies. However, the Rady School of