Net Delivery Exposure (NDX)
The time between when a cardholder is charged and when their order is successfully fulfilled.

Etiquette practiced or advocated on the internet and in emails.

Netscape Search
Netscape Search is part of Netscape - one of the most popular web portals on the internet.

A group of computers connected together.

news server
Computer that receives, stores, and serves Usenet newsgroup messages.

A news discussion on a particular topic that is distributed via Usenet.

news reader
Program that lets people read and respond to messages in Usenet newsgroups.

newsletter / ezine
Newsletter or magazine delivered via email or published on the Web.


offline / off-line
Not connected to a network.

online / on-line
Connected to a network.

Open Directory Project / Dmoz
Open Directory Project is the largest human-edited web directory on the internet.

opt-in email
Email that recipients have previously requested by subscribing at a website or via email.

opt-out email
Opt-out email is similar to opt-in email, except that email recipients are systematically added to a mailing list, unless they choose to opt out of, rather than into joining a list.

OS (Operating System)
A program that provides the basic functionality of a computer. For example, Windows, MacOS and Linux are all operating systems.

out of the box
Synonym for "off the shelf," meaning a ready-made software, hardware, or combination package.

outgoing link
Link going from your site to another site.

Overture, formerly known as GoTo, processes more pay per click searches than any other engine of its kind.


P2P (Peer-to-Peer)
Process whereby computers can trade information between each other without having to pass the information through a centrally controlled server as with email or IM programs.

page jacking / pagejacking
The theft of original content from a site for republication at another site.

page view / impression
A measure of the number of pages visited by users.

Paid Inclusion Listings
Paid inclusion listings are guaranteed search engine site inclusion reviews in exchange for a one-off fee.

payment threshold
The minimum accumulated commission an affiliate must earn to trigger payment from an affiliate program.

pass-along rate
The number or percentage of people who pass on a message or file, which is typically a measure of the effectiveness of word-of-mouth marketing.

Pay Per Click Search Engines
Pay Per Click (PPC) search engines are also known as Bid For Location, Bid For Position, Cost Per Click (CPC), Pay For Performance, Pay Per Performance, Pay For Placement, Pay Per Placement, Pay For Position, Pay Per Position, Pay For Ranking, Pay Per Ranking and Pay For Result search engines. These are search engines that allow advertisers to bid for rankings. The higher they bid, the higher they rank.

Pay Per Click advertising
Pay Per Click advertising is where an advertiser pays for each visitor sent by a website.

PDA (Personal Digital Assistant)
A term for any small mobile hand-held device that provides computing, information storage and retrieval capabilities. These include schedulers, calendars and address books.

PDF (Portable Document Format)
Adobe's PDF is a file format that captures all the elements of a printed document as an electronic image that you can view, navigate, print, or send. To view PDF files, you need the free Acrobat Reader. Once you've downloaded the Reader, it will start automatically whenever you want to download a PDF file.

Perl (Practical Extraction and Reporting Language)
Perl is a popular programming language used for developing common gateway interface (CGI) programs.

permission marketing
A marketing concept of selling goods and services to prospects who have explicitly agreed in advance to receive marketing information.

persistent cookie
A cookie which remains on the user's hard drive until the user deletes it.

PGP (Pretty Good Privacy)
PGP is a program used to encrypt and decrypt email over the internet. It is also used to send an encrypted digital signature that lets the receiver verify the sender's identity and know that the message was not changed en route.

PICS (Platform for internet Content Selection)
The PICS specification enables labels to be associated with internet content. It was originally designed to help parents and teachers control what children access on the internet, but it also facilitates other uses for labels, including code signing and privacy.

ping (Packet internet or Inter-Network Groper)
Basic internet program that lets you verify that a particular IP address exists and can accept requests.