PDF is a file format developed by Adobe Systems for representing documents in a manner that is separate from the original operating system, application or hardware from where it was originally created. A PDF file can be any length, contain any number of fonts and images and is designed to enable the creation and transfer of printer-ready output.
Each PDF file encapsulates a complete description of a 2D document (and, with the advent of Acrobat 3D, embedded 3D documents) that includes the text, fonts, images and 2D vector graphics that compose the document. They do not encode information that is specific to the application software, hardware, or operating system used to create or view the document.
HTML5 is the fifth revision of the HTML standard, it's main aims are to improve the support for the all types of multimedia with the intention to keep it readable by both humans, computers and all devices. HTML5 has become the adopted standard following Apple CEO Steve Jobs very open letter entitled 'Thoughts on Flash' where he concludes that 'Flash is no longer necessary to watch video or consume any kind of web content' and that 'new open standards created in the mobile era, such as HTML5, will win'.
Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)