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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.

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

Nazwa.pl is a Polish web hosting provider owned by NetArt Group.

Nazwa.pl is a Polish web hosting provider owned by NetArt Group.

Nazwa.pl is a Polish internet services provider owned by NetArt Group.

Nazwa.pl is a Polish internet services provider owned by NetArt Group.

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

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.

Brotli is a lossless compression algorithm developed by Google.

HTTP/2 is the second major version of the HTTP network protocol.

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.

Transitional version of XHTML.

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

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

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