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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.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Animate is a CSS library focusing on animations.

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

KT Corporation (formerly Korea Telecom and Hanguk Tongshins) is a South Korean telecommunication operator, also offering web hosting services.

KT Corporation (formerly Korea Telecom and Hanguk Tongshins) is a South Korean telecommunication operator, also offering web hosting services.

Cafe24 is a Korean hosted e-commerce platform provider.

Cafe24 is a Korean hosted e-commerce platform provider.

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

The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.

jsDelivr is a service for hosting JavaScript files.

The jQuery CDN hosts copies of the jQuery library, provided by MaxCDN.

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.

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.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

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

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.

HTML5 is the fifth revision of the HTML standard.

Transitional version of HTML.

EUC-KR (Extended Unix Code Korean) is a multibyte character encoding system used to represent Korean text.

KS C 5601 (also known as KS X 1001) is a South Korean character set to represent hangul and hanja characters.

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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