With more than 2 million entries, PQD&T is the single, central, authoritative resource for information about doctoral dissertations and master's theses. Dissertations published from 1980 forward include 350-word abstracts written by the author. Master's theses published from 1988 forward include 150-word abstracts. UMI offers over 1.8 million titles for purchase in microfilm or paper formats. More than 600,000 are available in native or image PDF formats for immediate free download.