Giberish	Meaningless data
Impostor	Person pretending to be someone else
Decipher	Convert to meaningful data
MAC	Message-authentication code
Tenets	Principal features
Tamper	Make unauthorised changes
sender's private key	to encrypt the MAC of a digital signature
trusted issuer's private key	to encrypt the MAC of a message
the recipent's private key	to decrypt a received message
the recipent's public key	to encrypt a message for sending
BT	British Telecom
Smart phone	A telephone that can translate English into various languages in real-time
Intelligent agent	A computer program that watches, learns and communicates with the user
Rocket science	Very advanced study
R&D	Research and development
Upload	Transfer data from a client device to a server computer
Supercomputer	Most powerful type of computer
Bluetooth	A microwave high-speed wireless link system designed to work with portable equipment
SM band	An unlicensed frequency range at 2.45GHz
RF	Radio frequency
IEEE 802.11	A standard for networking systems with a packet-switching protocol
Frequency hopping	Constantly switching channels
Usable density	The number of devices that can be used the same area
piconet	Very low power network links between Bluetooth devices
NAS	Network attached storage
Fibre Channel	A type of high speed interconnection
SAN	Storage area network
Mirror	Write copies of data to two disks at the same time
Server farm	A large collection of computers that work together to provide services on a network
Disk array	A set of interconnected disks
misdirection routine	hides the presence of the code
reproduction routine	attaches a copy of itself to another program
trigger routine	decides when and how to activate the payload
payload routine	does the damage
RAID	Redundant array of inexpensive disks
RAID controller	A device for controlling a set of hard disks
An array	A set
Striping	A process of spreading data across a set of disks
Mirroring	The tehinique of writing the same information to more than one drive
Parity data	Information which is used to restore data if one of the RAID drivers fail
ISDN	Integrated Services Digital Network
TA	Device installed on a PC to allow it to recive ISDN signals
Data channel	Digital channel used to carry ISDN signalling and supervisory information to the network
Bearer channel	Digital channel used to carry ISDN data
DSL	Digital Subscriber Line
Splitter-based services	DSL system that separates the digital signals from the analogue signals
ADSL	Asymmetric Digital Subscriber Line
Metadata	Data about data
Metalanguage	A language from which you can create other languages
HTML	A coding system used for structuring and formatting documents
XML	Extensible markup language
Markup language	An example of a page presentation language
SMTP	A simple mail transfer protocol that is used to send messages between servers
'Push' operation	An email transfer process in which the connection is initiated by the sending computer
POP	A message-retrieval protocol that downloads all email messages at the same time
'Pull' operation	An email transfer process in which the receving computer initates the connection
IMAP	A mail transfer protocol that initially only retrieves the message headers
Internet address	A 32-bit number identifying a node on an IP network
Resolution Protocol	Standard used for software that routes data through a gateway
Look-up table	Stored information used to route data through a gateway
Gateway	A device for connecting dissimilar networks
User Datagram Protocol	Moves information to the correct application on receving system of a network
Transmission Control Protocol	Manages communication exchanges between computers on the internet
Bracketing	Set of boundaries for the beginning and end of a mesage
Half-duplex	Transmission mode in which each computer takes turns sending and receving
Full-duplex	Transmission mode in which both computers send and recive at the same time
Checksum	Mathematical calculations based on the contents of data
Website	Collection of related webpages
ASP	Application service provider
Virus	Self-replicating program
Office suite	Set of standard programs used in an office
Bandwidth	Capacity of a network connection
Broadband	High capacity Internet connection
Data centre	Facility for storing large amounts of information
SAP	Common enterprise resource planning tool
GUI	Graphical user interface
Multimodal interface	A system that allows a user to interact with a computer using a combination of inputs
Intelligent agent	Software assistant that performs tasks such as retrieving and delivering information
TTS	Text to speech
The Intelligent Room	A project of the Massachusetts Institute of Technology's Artificial Intelligence Lab
Kernel	The core of an operating system that handles memory allocation, talks to hardware devices
Free Software Fundation	An organisation of volunteers dedicated to making good software that anyone could use without paying
Source code	The orginal systems program from which compiled programs are generated
Open source	A type of software development where any programmer can develop or fix bugs in the software
A distribution	A complete operating system kit with the untilities and apps you need to make it to be useful
X	A standard distributed windowing system on which people implement graphical interfaces
Data mining	A process of filtering through large amounts of raw data for useful information
AI	A computing tool that tries to operate in a way similar to the human brain
Cleansed data	Data free from duplicate and erroneus information
Data warehouse	Storage method of archiving large amounts of data to make it easy to acces
Cache hit	The processor is succesful in finding the data in the cache
Cache controller	The logic circuits used to control the cache process
Cache coherency	Ensuring that any changes written to main memory are reflected within the cache and vice versa
Write-through cache	The process of writing directly to both the cache and memory at the same time
Write-back cache	The process of writing only to the cache and not to memory unless the space is used to cache new dat
Line size	The amount of data transferred to the cache at any one time
Edutainment	Multimedia materials with a combination of educational and entertainment content
Multimedia	A combination of text with sound, video, animation, and graphics
Expert system	Software that enables computers to 'think' like experts
Telecommute	Use computers to stay in touch with the office while working at home
Information superhighway	Internet system designed to provide free interactive acces to resources for humanity