AVP Anti Virus Encyclopaedia is a wonderful reference you can use to explore the seedy world of computer viruses. It features a fine glossary, and a detailed explanation of what it is that defines destructive computer programs as viruses, Trojans, worms, etc. It also establishes subcategories, such a boot, macro, and file viruses, and makes it quite clear just what it is these programs do. Finally, detailed information regarding tons of individual known computer viruses is presented in a clear and concise manner. You can browse viruses by category, conduct a keyword search, or navigate alphabetically through the extensive database. If your interested in computer viruses, AVP Anti Virus Encyclopaedia is simply a must-have. It provides an absolute wealth of information and -- best of all -- it's free.