HTML5 is the newest version of the HyperText Markup Language that was developed in the late 80’s in order to describe documents that linked to each other. In it’s early days, HTML’s role was simple…to help describe a document’s structure and to allow cross-linking of documents.
a self-contained program or piece of software designed to fulfil a particular purpose; an application, especially as downloaded by a user to a mobile device. Developing apps for mobile devices requires considering the constraints and features of these devices.
“CSS” is an acronym for Cascading Style Sheets, a web-based markup language used to describe the look and formatting of a website to the browser, most commonly used in HTML or XHTML web pages but also applicable to XML documents