The USHMM site offers the Web's most extensive selection of archival material having to do with the Holocaust. The archives contain photographs, documents, films and videos, and the oral histories of hundreds of Holocaust survivors. If you want to learn more about the events of the Holocaust, a tour through this site will serve as a moving and provocative starting point.

In 1977, Simon Wiesenthal, a Holocaust survivor, founded both The Museum of Tolerance in Los Angeles and a center in his own name with the goal of promoting Holocaust remembrance and the defense of human rights. The center's Web site provides an exhaustive selection of educational materials dealing with the Holocaust and its reverberations, such as how to respond to those who deny the Holocaust ever happened.

The Holocaust History Project is an archive of Holocaust-era documents and photographs that you can download and print for free. This site also maintains a thorough list of links to other Holocaust Web sites.

Nizkor's site is organized into five sections: Holocaust research today, the camps, the Nuremberg trials, individuals involved in the Holocaust and Holocaust studies, and a collection of special features, each focusing on a particular aspect of the Holocaust. This format facilitates browsing specific areas of interest and serves as an excellent means for approaching the daunting amount of Holocaust topics.

Facing History and Ourselves, a Boston-based educational organization, uses the Holocaust as a model for comparing history to contemporary society. Its mission is to engage students in an examination of racism, prejudice, and anti-Semitism and to foster tolerance. The Facing History Web site is an outstanding resource for study guides, books, and multimedia materials on the Holocaust, and it offers an "online campus" that joins educators around the world.

As its name suggests, this Web site serves as an online library of the Holocaust. The Cybrary's collection of Holocaust information and materials is astoundingly vast and includes a bookstore of more than 2,000 books on the Holocaust that you can purchase online.

This Holocaust site produced under the auspices of the American-Israeli Cooperative Enterprise offers all the tools necessary to provoke students and teachers alike to undertake a meaningful investigation of the Holocaust. JSOURCE presents several aspects of the Holocaust not covered elsewhere such as the Jewish resistance movement, the burning of books by the Nazis, and the relationship of the Vatican to the Holocaust.

This carefully researched book, which triggered the lawsuit that lies at the heart of the NOVA film "Holocaust on Trial," is a thorough denial of the arguments of Holocaust deniers, who, Lipstadt stresses, threaten to undermine the Western rationalist tradition with their dangerous distortions of history.

A comprehensive retelling of the nightmare that was the Holocaust, this book attempts, as the author writes in the preface, "to draw on the nearest of the witnesses, those closest to the destruction, and through their testimony to tell something of the suffering of those who perished, and are forever silent."

This thick book by a respected historian focuses on the 19 official Nazi concentration camps and the people associated with them, both the dehumanizers and the dehumanized.

When Lifton began researching this penetrating book, he told a Holocaust survivor that he was having nightmares about Auschwitz, which figures largely in the book. "Good," said the survivor. "Now you can do the work." And he has: This book, for all the macabre nature of the subject -- Nazi medical experimentation -- is riveting.