Some acronyms are shortened forms of the school's name, like how Hongik University (, "Hongik Daehakgyo") is shortened to "Hongdae" (, "Hong, the big " or "Hong-U") Other acronyms can refer to the university's main subject, e.g. Korea National University of Education (, "Hanguk Gyowon Daehakgyo") is shortened to "Gyowondae" (교원대, "Big Ed." or "Ed.-U"). Other schools use a Koreanized version of their English acronym. The Korea Advanced Institute of Science and Technology (, "Hanguk Gwahak Gisulwon") is referred to as KAIST (, "Kaiseuteu") in both English and Korean. The 3 most prestigious schools in Korea are known as SKY (스카이, "seukai"), combining the first letter of their English names (Seoul National, Korea, and Yonsei Universities). In addition, the College Scholastic Ability Test (, "Daehak Suhang Neungryeok Siheom") is shortened to "Suneung" (, "S.A.").