As such, the information and data sciences now draw not just upon traditional areas spanning computer science, applied mathematics, and electrical engineering -- signal processing, information and communication theory, control and decision theory, probability and statistics, algorithms -- but also a range of new contemporary topics such as machine learning, network science, distributed systems, and neuroscience. The result is an area that is new, fundamentally different that related areas like computer science and statistics, and that is crucial to modern applications in the physical sciences, social sciences, and engineering. The Information and Data Science (IDS) option is unabashedly mathematical, focusing on the foundations of the information and data sciences, across its roots in probability, statistics, linear algebra, and signal processing. These fields all contribute crucial components of data science today. Further, it takes advantage of the interdisciplinary nature of Caltech by including a required set of application courses where students will learn about how data touches science and engineering broadly. The flexibility provided by this sequence allows students to see data science in action in biology, economics, chemistry, and beyond.

The following is a list of materials required for a complete application for first-year admission. If your application is missing any one of these components, it will be considered incomplete. • Common Application or the Coalition Application with the Supplemental Application Essays • Caltech does not have a preference between the Common Application or the Coalition Application. We advise that you use the best platform for your application process. • Caltech is also a QuestBridge Partner. Students may apply for Caltech through the QuestBridge National College Match. • $75 application fee or fee waiver (by request) • Standardized tests • Teacher evaluations • Secondary School Report • This is a document that is sent to Caltech by your high school college counselor. It provides context about your school that helps the Admissions Committee evaluate your application holistically. • Academic transcripts • Additional requirements of our international citizen applicants: • TOEFL scores: Required of all international citizens unless 1) your native language is English or 2) you have studied for two or more years in a school where English is the language of instruction. The latter must be completed prior to the application deadline. We do not accept the IELTS or any other substitute for the TOEFL requirement. • International Financial Aid Statement of Intent: When an international citizen applies for freshman admission, the application prompts questions to confirm their understanding of our financial aid policy and thus confirm their financial aid intent towards Caltech. Caltech is need-sensitive for international citizens because the total amount of financial aid funds is limited for these students, and we remain committed to meeting the demonstrated need of all admitted students. See our International Citizens' page to read the full extent of our financial aid policy for international citizens.