Carnegie Mellon theses are now ONLINE and can be searched through the ProQuest database Dissertations & Theses @ Carnegie Mellon University that enables access to citations and abstracts of all dissertations and theses, as well as the full text in PDF format.
In the Carnegie Mellon Library catalog, uses the term THESIS to denote both masters' theses and dissertations. However, the number of master's theses is limited. The catalog treats theses and dissertations like books, and they can be borrowed as such. Theses may be in print, microfiche, or microform.
The best source to find theses is ProQuest Dissertations & Thesis Global. Policies regarding theses and dissertation collections largely vary between universities. So check the library website of the university of interest.