* Colleges tend to focus on undergraduate education (Bachelor's degrees). They may offer a smaller range of programs and often have a more intimate learning environment. They may or may not offer some postgraduate programs (Master's or Doctorate).
* Universities typically offer a broader range of programs, including undergraduate, graduate (Master's and Doctorate), and often professional degrees (law, medicine, etc.). They are generally larger institutions with more diverse research activities and faculty. They usually have multiple colleges or schools within their structure, each focused on a specific subject area (e.g., College of Arts and Sciences, School of Engineering).
In short, a university is often considered a larger, more comprehensive institution encompassing multiple colleges, while a college is a single institution primarily focused on undergraduate education. However, some colleges *are* universities (often older, prestigious institutions) and the titles are sometimes used interchangeably, particularly in the US. The key difference lies in the scope of programs and the presence of graduate programs and research activities.