A vector images format for the HP plotter, created with the help of the Hewlett-Packard Graphics language. It consists of a set of two-character encoding which determines the allocation of starting points in the plotter. It’s used in various programs for plotting and it’s scalable, maintaining image quality. It has an ASCII structure and is an equivalent to HPG files.
HTML is a Web format file. HTML source code can be changed in a text editor. HTML files are being developed for future use in the users web browser, allowing you to format text, images and other materials required sites. File with this format use tags to build web pages. HTML code is parsed Web browser and usually not visible to the user.