In computer viruses.dr is part of the McAfee naming convention for viruses and Trojans. McAfee attaches the .dr suffix to the end of a virus names to indicate that it detected a dropper; a file that installs or drops other malware.
Symantec Antivirus Research Center The Symantec Antivirus Research Center offers a wealth of information on viruses. It begins with a list of hot topics (new virus and virus products), and also provides links to virus alerts, an information database, references, submit virus samples, Macintosh viruses, and Symantec virus product information.
Webopedia's "Did You Know...?" Section Use this Webopedia knowledge section for an in-depth overview of specific technologies and occurrences in the areas of Computer Science, The Internet, and Computer Hardware and Software.