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

Adobe Flash (by Adobe Systems, formerly Shockwave Flash and Macromedia Flash and now part of Adobe Animate CC) is a multimedia platform for adding animation and interactivity to web pages.

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

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

CQ Counter is a website hit counter by Cybernet Quest.

Top.Mail.Ru is a Russian web access counter service.

LiveInternet is a Russian web access counter service.

Rambler is a Russian web portal offering a web counter service.

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.

Gzip (GNU zip) is a file compression algorithm.

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

Transitional version of HTML.

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

Windows-1251 is an 8-bit character encoding, designed to cover languages that use the Cyrillic alphabet.

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.

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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