Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation (that is, the look and formatting) of a document written in a markup language. wikipedia.org

jQuery is a cross-browser JavaScript library designed to simplify the client-side scripting of HTML. Its syntax is designed to make it easier to navigate a document, select DOM elements, create animations, handle events, and develop Ajax applications. wikipedia.org

Joomla is a free and open source content management system (CMS) for publishing content on the World Wide Web and intranets and a model_view_controller (MVC) Web application framework that can also be used independently. wikipedia.org

HyperText Markup Language (HTML) is the main markup language for web pages. HTML elements are the basic building-blocks of webpages. wikipedia.org

Vue.js is a library for building interactive web interfaces. The goal of Vue.js is to provide the benefits of reactive data binding and composable view components with an API that is as simple as possible. wikipedia.org

PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. wikipedia.org

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles. wikipedia.org

Web development is a broad term for the work involved in developing a web site for the Internet (World Wide Web) or an intranet (a private network).

Kohana is an elegant HMVC PHP5 framework that provides a rich set of components for building web applications.

Object-oriented programming (OOP) is a programming paradigm using "objects" _ data structures consisting of data fields and methods together with their interactions _ to design applications and computer programs. wikipedia.org

OpenCart is a free open source shopping cart system written in PHP and released on a GNU GPL License.