unauthorized access – to gain entry without permission.
untrusted network – an area of interconnected digital devices where the security controls and/or assignment of authorizations and privileges are not subject to any central or acceptable level of control.
URL – acronym for uniform resource locator. This is essentially the address (or path) where a particular destination can be found. For example, the main address for the Google website is the URL http://www.google.com
US CERT – acronym for the United States Computer Emergency Readiness Team.
USB – acronym for Universal Serial Bus. This is a standard connector that exists on most computers, smartphones, tablets and other physical electronic devices that allow other electronic devices to be connected. Used for attaching a range of devices including keyboards, mice, external displays, printers and external storage.
User Contingency Plan – the alternative methods of continuing business operations if IT systems are unavailable.
ungenious –something that was intended to achieve one goal but has a spectacularly negative outcome instead
Unix – a popular multi-user, multi-tasking operating system developed at Bell Labs in the early 1970s by Ken Thompson, Dennis Ritchie, and others. Unix was designed to be a small, flexible system used exclusively by programmers.