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AdSense is an ad serving application run by Google. Website owners can enroll in the program to enable text, image, and, more recently, video advertisements on their websites. These advertisements are administered by Google and generate revenue on either a per-click or per-impression basis. Google not only offers AdSense for ...

Website on Yandex Advertising Network, Yandex.Direct ads.

FancyBox is a tool for displaying images, html content and multi-media in a Mac-style "lightbox" that floats overtop of web page.

Websites using some form of Captcha technology on them.

Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.

Website using the € symbol on their website - meaning it may accept payment in Euros.

Russian payment provider

nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.

A family of standard web feed formats used to publish frequently updated information like blog entries, news headlines, audio and video.

The IPS Community Suite is a flexible, integrated set of apps for building great communities on the web.

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

By adding rel="home" to a hyperlink, a page indicates that the destination of that hyperlink is the homepage of the site in which the current page appears.

Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is.

Meta descriptions are HTML attributes that provide concise explanations of the contents of web pages. Meta descriptions are commonly used on search engine result pages (SERPs) to display preview snippets for a given page.

The http-equiv attribute provides an HTTP header for the information/value of the content attribute. The http-equiv attribute can be used to simulate an HTTP response header.

Wesites using favicon rel tag

Chrome for Android, since version 39 supports the "theme-color" meta tag to allow websites control the background color of the tab's UI header.

A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

A web page. Every web page is implicitly assumed to be declared to be of type WebPage, so the various properties about that webpage, such as breadcrumb may be used. We recommend explicit declaration if these properties are specified, but if they are found outside of an itemscope, they will be assumed to be about the page

The act of searching for an object. Related actions: FindAction: SearchAction generally leads to a FindAction, but not necessarily.

A WebSite is a set of related web pages and other items typically served from a single web domain and accessible via URLs.

The most generic type of schema.org item.

A scheme.org entity that represents a person (alive, dead, undead, or fictional).

A scheme.org entity that represents an article, such as a news article or piece of investigative report. Newspapers and magazines have articles of many different types and this is intended to cover them all.

Any offered product or service. For example: a pair of shoes; a concert ticket; the rental of a car; a haircut; or an episode of a TV show streamed online.

An offer to transfer some rights to an item or to provide a service—for example, an offer to sell tickets to an event, to rent the DVD of a movie, to stream a TV show over the internet, to repair a motorcycle, or to loan a book.

A review of an item - for example, of a restaurant, movie, or store.

A scheme.org entity that represents a blog post.

A scheme.org entity that represents a blog.

Open graph locale entity tag

Open graph description entity tag

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

Open graph site name entity tag

Open graph type entity tag

Open graph url entity tag