# Undergraduate Advising

**Source**: https://csadvising.seas.harvard.edu/
**Parent**: https://csadvising.seas.harvard.edu/firstyear/

## *Welcome to the Harvard CS advising website!*

Info

**Changes to CS 51, 61, and 91r**

1. CS 51 will be offered every fall rather than every spring. It will be offered in spring 2026, fall 2026, and every fall thereafter for the foreseeable future.
2. CS 61 will be offered every spring rather than every fall. It will be offered in spring 2027, three semesters from its fall 2025 offering. There will be a *limited enrollment* offering in fall 2026 for students who need the course and cannot take it in spring 2027, but it will only be offered in the spring after fall 2026.
3. Starting in Fall 2027, CS 91r (the supervised reading/research course) will be offered only on a SAT/UNS grading basis, not for a letter grade. This doesn’t affect what concentration requirement tags it satisfies, but note that it remains the case that at most two grades of P or SAT can count for CS concentration credit.

Info

To **declare a CS concentration**, please .
We highly recommend you read our  and perhaps reach out to one of our [peer concentration advisors](/pca). You should also consider joining the [Harvard CS Undergraduate Piazza board](https://piazza.com/harvard/other/cs).

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**Integer Overflow**: Harvard CS is growing and so are our course numbers! To avoid reuse of numbers for courses that change over time, 3-digit COMPSCI numbers are changing to 4-digit COMPSCI numbers for Fall 2024 onward. (1-digit and 2-digit COMPSCI numbers are unchanged.) To most 3-digit COMPSCI numbers, we have simply appended a 0, but a few courses have changed otherwise, per [this mapping](https://docs.google.com/spreadsheets/d/e/2PACX-1vSUEKpQ0xZTnoZoYNZ-JY0ny0VdsXEn0HxycvoN5khyTq1LO1ejJakvUp0KaCmtSFXfT_MLXRgCh-id/pubhtml?gid=917127225&single=true). For some time, it should still be possible to search [https://my.harvard.edu/](my.harvard.edu) by courses’ old numbers.

This website contains information relevant to **current Harvard College students** that are studying computer science as a primary, secondary, or joint concentration, or are interested in doing so. It is maintained by the .

The following websites contain more information about Harvard, Computer Science, and the School of Engineering and Applied Sciences: The [Computer Science Area website](https://www.seas.harvard.edu/computer-science) contains information about research areas, faculty, and administration in computer science at Harvard. The [Harvard admissions website](https://college.harvard.edu/admissions) contains information about applying to study at Harvard. Information for prospective undergrads interested in the School Engineering and Applied Sciences (SEAS) can be found [here](https://www.seas.harvard.edu/audiences/prospective-undergraduates).

### Contents:

- [Frequently Asked Questions](/faq/) on concentrating in Computer Science at Harvard.
- [Concentration Information](/concentration/), including requirements, how to declare, and combining with CS with other areas.
-  information, including how academic advisors are assigned, the role of academic advisors, and info about [Peer Concentration Advisors](/advising/pca/).
- [Research Opportunities](/research/), including more info about a Senior Thesis in CS, and CS 91r (Supervised Reading and Research).
-  in the Harvard CS community.
- [Additional Resources](/resources/) for CS concentrators and pre-concentrators, including course listings and links to useful guides, forums, and mailing lists.
-  for your Plan of Study, CS 91r, and requesting a specific CS concentration advisor.