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

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

First Colo is a German web hosting provider owned by diva-e. This includes the former brand Accelerated.

First Colo is a German web hosting provider owned by diva-e. This includes the former brand Accelerated.

GoDaddy is a provider of internet services. This includes the former brand Media Temple.

Hornetsecurity (formerly Antispameurope) is a German IT security services provider, also offering email security services, owned by Proofpoint. This includes the former brand Altospam.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Matomo (formerly Piwik) is an open source web analytics program.

Facebook Social Plugins provide a way for Facebook users to share web pages with their friends.

The WhatsApp share button allows users to share content with their WhatsApp contacts.

LinkedIn Share Buttons enable visitors to to share website content with their LinkedIn network.

The Xing share button enables website visitors to share content on the Xing network.

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

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

Gzip (GNU zip) is a file compression algorithm.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

The Dublin Core Schema is a set of vocabulary terms that can be used to describe web resources and physical resources.

Microdata is a specification to integrate metadata within existing content on web pages.

HTML5 is the fifth revision of the HTML standard.

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

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.

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

Scalable Vector Graphics (SVG) is an XML-based vector image format.

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