Interdepartmental Majors (IDM)

If your academic interests encompass two academic disciplines in Trinity College, you may wish to consider declaring an interdepartmental major (IDM). The IDM draws in equal measure upon two Trinity College departments or programs that offer a major, each requiring 7 courses for a total of 14 courses.

Computer Science is working with several partners to create “predefined” IDMs, listed below, whose programs of study are pre-approved by the respective Directors of Undergraduate Studies. If your interests happen to align with one of these predefined IDMs, we highly encourage to follow it because it makes planning ahead and optimizing your program of study easier, and it allows our advisors to provide more informed advice and make more consistent decisions. There are currently two such predefined IDMs:

An IDM with Computer Science and Another Discipline

If you would like to explore whether an IDM is right for you, first read about choosing and declaring an IDM here, and then discuss it with the Directors of Undergraduate Studies in Computer Science and the other discipline. If you would like to pursue an IDM involving some other discipline for which nothing has been predefined, please follow these guidelines:

  • All IDMs have the following pre-requisites:
    • MATH 111
    • MATH 112 or 100 level STAT or higher
  • If you have taken COMPSCI 101, 102, or 116, we can count one towards the 7 COMPSCI courses required.
  • Include in your 7 COMPSCI courses 201, 250, and one of 230 and 330.
    • Note that 230 is a prerequisite for 330 but could be skipped if you have probability and other math courses.
  • COMPSCI electives should make sense for the other disciplinary you are considering.
    • For example, CS 260 would make sense with Biology, CS 323 would make sense with Economics, and CS 342 would make sense with Public Policy.

These general guidelines do not apply to specific, predefined IDMs.

Declaring an IDM

To declare an IDM, you must develop a written plan for your program of study, give your IDM a descriptive title, and work with the directors of undergraduate studies in both departments to put together a cogent list of courses for the major that they will approve.  You will specify which department is considered "primary".   In considering your proposal, the directors of undergraduate studies should collaborate to insure that your IDM is rigorous and coherent.  After you complete the IDM application and worksheet below and have both directors of undergraduate studies and advisors sign the application, then submit the signed form and worksheet to Dean Karen Murphy in 011 Allen Building for final approval, and then processing. 

FORM: IDM Application.pdf
Click here to download the worksheet: IDM-Worksheet.xlsx

More information about IDMs on the Trinity Arts & Sciences website.