The virtual reality modeling language (VRML) is a file format for representation of interactive 3D world objects over the world wide web (www). It finds its usage in creating three-dimensional representations of complex scenes such as illustrations, definition and virtual reality presentations. The format has been superseded by X3D. Many 3D modelling applications can save objects and scenes in VRML format.
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Portable document format (PDF) is a type of document created by Adobe back in 1990s. The purpose of this file format was to introduce a standard for representation of documents and other reference material in a format that is independent of application software, hardware as well as operating system. PDF files can be opened in Adobe Acrobat Reader/Writer as well in most modern browsers like Chrome, Safari, Firefox via extensions/plug-ins.
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