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JavaScript is a lightweight, object-oriented, cross-platform scripting language, mainly used within web pages.

HTML - Hypertext Mark-up Language - is the a language to define web pages.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

ICO is an image file format for computer icons, originally used in Microsoft Windows, on the Web often used for favicons.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Persistent cookies with an expiration time of up to 1 day.

Persistent cookies with an expiration time between 1 day and 1 month.

Persistent cookies with an expiration time between 1 month and 1 year.

Persistent cookies with an expiration time between 1 and 10 years.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google.

Full Circle Studies collects information about general website visitation patterns as part of the ComScore market research.

ClickTale is a hosted in-page web analytics service.

Nielsen NetRatings is a web site visitor tracking service provided by The Nielsen Company.

Crowd Science measures the demographics of a website audience.

New Relic is a web application performance management tool.

DoubleClick is an advertising network owned by Google.

Microsoft Advertising is an advertising platform by Microsoft, formerly called Aquantive and also including Atlas Solutions.

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