SKY is an unofficial grouping and acronym for the three most prestigious and academically competitive universities located in Seoul, South Korea. It includes Seoul National University, Korea University, and Yonsei University.

1. Seoul National University (SNU): Often recognized as the top university in South Korea. Known for their high standards and strict admission process, especially in disciplines like Engineering and Medicine. The admission rate is typically less than 20%.

Yonsei offers a better quality of life, but may have lower academic prestige. SNU's CSE program lacks diversity, usually admitting only one foreign student per year.