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- NAND
Short for Not AND. In electronics, NAND gates have two or more inputs and one output. They are important because all logic circuits can be constructed from NAND gates alone. The output of a NAND gate is FALSE only if all inputs are TRUE, otherwise the output is TRUE. 
- narrow band
Narrow band is used to describe bandwidths less than the smallest recognised broadband bandwidth. A dial-up connection is narrow band. - natural language interface
An interface where users can interact with the computer using a language similar to ordinary speech or writing, rather than a computer language, command line interface, or graphical user interface. - navigate
The process of moving within and between websites and web pages. - needs analysis
The investigation of what a client needs from a computer system. Part of the design process. - nested folder
A folder which is contained inside another folder. - nested loop
A nested loop is a loop contained within another loop. The inside loop will be executed a number of times for each single execution of the outer loop. - net
Short for internet. - netiquette
The set of informal social conventions which seek to define good behaviour when using the internet. These conventions try to encourage behaviour that does not cause inconvenience or annoyance to other users. - network
Two or more computers connected together and able to communicate with each other. - network cable
The cable which connects together computers in a local area network. - network card
Strictly, network interface card, NIC. This is a printed circuit board or card that is installed in a computer so that it can be connected to a local area network (LAN), giving a dedicated, full-time connection to the network. Typically, the card is specifically designed for the particular LAN transmission technology, e.g. ethernet. - network interface card (NIC)
This is a printed circuit board or card that is installed in a computer so that it can be connected to a local area network (LAN), giving a dedicated, full-time connection to the network. Typically, the card is specifically designed for the particular LAN transmission technology, e.g. ethernet. - network manager
The person in an organisation who is responsible for managing the computer network. - network news transfer protocol (NNTP)
The protocol on the internet that defines communication methods between news servers and news clients. - network operating system
Software needed to enable a computer to communicate with other computers (stations) using a network. All computers on a network must have the same network operating system software to be able to communicate through the network. - network printer
A printer available to the users on a network, possibly with its own network interface card. - network topology
The way the components of a network are connected together - for example, a star network will have each network station individually connecting to a central hub, whereas a ring network has them all joined together in one large ring. - newsgroup
A web-based discussion forum which usually has a particular focus e.g. a hobby or profession. There are thousands of newsgroups, all of which were originally based on Usenet, but the term has become more generalised now. - node
In a tree data structure, the data items are usually called nodes with the links known as branches. A node may have any number of descendants but itself may only be the descendant of one other node. This data structure is often seen in a directory of files, where directory nodes are linked to sub-directories. It is usual in computing to draw a tree diagram
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