Glossary

Internet, computer and design terms

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P

Term	Definition
PDF	*Portable Document Format* is a file standard developed by Adobe to allow documents to be distributed electronically while maintaining layout integrity. PDFs are useful where a large amount of information is to be provided and where reading such material onscreen in unfeasible or inappropriate.
Permission Based Marketing	An opt-in policy requires a potential customer to self-select the services they wish to subscribe to, and how any information they provide may be used. Also referred to as permission-based marketing In practice, an opt-in policy involves creating forms where services such as email newsletter subscriptions are unchecked by default. The benefit of this approach is that a user who has actively considered the offering before signing-up, is a more qualified potential customer.
PHP	PHP Hypertext Preprocessor is a server-side, HTML embedded scripting language used to create dynamic Web pages. Designed for Windows and Unix type platforms
Picas	Unit of measurement. 6 picas equal one inch
Pixel	The smallest component of a digitised image which usually directly relates to the points of light that make up an image on the computer monitor. Pixels are also used as a unit of measurement relating to digital imagery.
Plug-in	A plug-in is third-party software that extends the capabilities of a computer program. In a web browser, a plug-in may be required to display non-standard (often multi-media) content formats. Common browser plug-ins include Flash, Quick Time and Shockwave.
PMS	Pantone Matching System. The PMS colour matching system is like a "recipe" for colour. It gives the printer exact measurements for ink colours, which allows a printer to mix a specified shade of colour and get consistent results.
Points	Unit of measurement. 72 points equal one inch. Fonts are measured in points, also called “point size.” A font that is 72 points in size will measure one inch tall from the baseline to the top of the ascender.

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