The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.


A type of non-replicating malicious code that has unexpected but mostly benign consequences that are easy to repair. For example, a nuisance may make your Windows desktop look like a MacOS desktop, or it may turn your desktop upside down. Also called a joke.