A person who enjoys learning the details of programming systems and how to stretch their capabilities, as opposed to most users who prefer to learn on the minimum necessary. A malicious or inquisitive meddler who tries to discover information by poking around.
Unauthorized use of, or attempts to circumvent or bypass the security mechanisms of an information system or network.
A hack session extended long outside normal working times, especially one longer than 12 hours.
A single computer or workstation; it can be connected to a network.
Information, such as audit data, from a single host that may be used to detect intrusions.