Internet website cookies - Files in browser used for saving your preferences, visual styles, to remember login and password, adverts are handled by cookies saved in browser. UI - User Interface - human friendly interface which is helping to communicate between human and computer or webpage. Page source - Code in which page was written. In page source you can find HTML, CSS or JavaScript. Meta tags - keywords for describing a page. For example you can use it to describe default language, description (for search engines), etc.. JavaScript / JQuery - These programming languages are mostly used in web development for such purposes like adding dynamic and interactive elements to websites. Hyperlinks - hyperlinks are texts, pictures, animations, etc. and you can add URL to them. For eg. you can be redirected to another website just with clicking on some text or picture.