As part of your research, you will want to do a literature review and bibliography. A very good way to start a literature review is to use one or more abstracting databases. Using these databases, you can identify relevant journal articles for your research topic, and probably find references to other documents, such as conference papers and technical reports.
The subjects web page offers an array of broad subjects. To identify databases for your subject, select a subject, and then link to Databases. The subjects page can also help you identify useful web resources and other libraries.
Depending on your research topic, you may also be interested in using: