The WPS file format is very similar to the DOC format, it too is a text document but it is created with Microsoft Works Word Processor; and does not include advanced formatting options and macros that a Word document may contain. Most versions of Microsoft Word can open a WPS file, as well as Microsoft Publisher. However this format has been discontinued since 2006 and replaced with the standard MS Word DOC format.
The file format WPS is used by Microsoft Works Word Processor files. These files contain word processing documents created by the Microsoft Works software suite. WPS files contain richly formatted text as well as images, clipart and tables. A C++ library exists, called libwps which allows reading and writing of WPS documents, this library allows applications such as OxygenOffice and NeoOffice to open and edit WPS files.
Microsoft Word Microsoft Works Word Processor NeoOffice OxygenOffice Works Converter
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.