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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.

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

Tencent is a Chinese IT and telecommunication company. This includes its QQ brand and others.

Tencent is a Chinese IT and telecommunication company. This includes its QQ brand and others.

CDNetworks is a content delivery network owned by Wangsu. This includes the former brand Quantil.

51dns.com (formerly DNS.com, 厦门帝恩思科技股份有限公司) is a Chinese provider of DNS services.

Tencent is a Chinese IT and telecommunication services provider. This includes its QQ and DNSPod brands.

Certum (formerly Unizeto) is a Polish SSL certificate authority owned by Asseco.

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

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

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/.

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.

Commercial entities