PsychiatryOnline is a powerful database that features DSM -- a very widely used psychiatric reference -- and numerous other psychiatric tools, e.g. journals; textbooks; American Psychiatric Association Practice Guidelines for the treatment of psychiatric disorders; self-assessment tools (for study, board certification and recertification review); clinical & research news; and medication information handouts.
A particularly important feature of Psychiatry Online is the DSM Library that includes full-text browsable versions of the following books: