The Carnegie Mellon Student Government consists of an executive branch and a legislative branch. The Executive Branch consists of three inidviduals: the Student Body President (SBP), the Student Body Vice President (SBVP), and the Student Body Vice-President of Finance (SBVPF). They serve the entire student body, graduate and undergraduate. The Legislative Branch has graduate and undergraduate components: the Graduate Student Assembly (GSA) and the Undergraduate Student Senate. These bodies pass legislation, recognize organizations, allocate student activities funding, and otherwise act on behalf of all student interests.
This is the core of traditional student government, as governed by the Student Body Constitution. The Activities Board (AB) is an external committee of the Student Senate, that acts more or less independently to provide events, concerts, films, lectures, technical assistance, and other activities for the campus. The Student Dormitory Council (SDC) is composed of student representatives from campus housing and is engaged in improving the quality of student life for residents.
There are also formally identified cooperative efforts among these components. The Joint Funding Committee is charged with creating a recommendation for the allocation a large portion of the total student activities fee, and is composed of representatives from the GSA and the Student Senate. The Student Body Dining Committee includes representation from the Student Dormitory Council, Undergradute Student Senate, and the Graduate Student Assembly, among other students. Finally, the Student Government Executive Committee brings together the leaders of student government: SBP, SBVP, SBVPF, Student Body Dining Chair, Student Senate Chair, GSA President, AB Chair, and SDC President.
Other non-student led organizations which are relevant include: Student Activities (and more generally, Student Affairs) which controls much of the infrastructure and processes relating to student organizations, Faculty Senate (the representative legislative body for faculty), and Staff Council (the representative legislative body for university staff).