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Duda is a hosted website building service.

Gambio is a German hosted e-commerce platform.

onpublix is a discontinued German content management system based on .NET by Oevermann Networks.

Microsoft's Active Server Pages technology on the .NET framework.

Java is a general-purpose language originally developed by Sun Microsystems.

PHP is a scripting language for creating websites.

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

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

React is an open source JavaScript library for building user interfaces, developed by Facebook.

ASP.NET Ajax is a JavaScript library based on ASP.NET, developed by Microsoft.

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

The Apache HTTP Server is an open source web server by the Apache Software Foundation.

The Internet Information Services (IIS) are a set of Internet-based services for Windows, developed by Microsoft.

Linux is a Unix-like open source operating system originally developed by Linus Torvalds.

Unix is a range of operating systems originally developed at Bell Labs. This includes Unix and Unix-like systems, such as Linux.

Windows is an operating system produced by Microsoft.

Duda is a hosted website building service.

Gambio is a German hosted e-commerce platform.

NetCologne is a German web hosting and internet service provider.

Amazon is a US-based e-commerce and cloud computing provider.

Strato is a European web hosting provider headquartered in Berlin and owned by United Internet.

NetCologne is a German web hosting and internet service provider.

Strato is a European internet services provider headquartered in Germany and owned by United Internet.

Strato is a European internet services provider headquartered in Germany and owned by United Internet.

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

DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.

Snowplow is an open-source web analytics platform.

Etracker offers real-time webanalytics services.

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.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

Secure cookies are used only via an encrypted connections, which may increase security.

Gzip (GNU zip) is a file compression algorithm.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

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/.

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.

Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.

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

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.

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

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