The .vsd file extension is the default file type associated with Microsoft Visio, a graphic drawing application which forms part of the Microsoft Office product set. As with several other Microsoft file formats, the .vsd extension cannot be read by many other applications. Examples of drawings typically created using Visio are flowcharts, process diagrams and topology diagrams.
.vsd files may contain text, objects and can link to other data sources using the ODBC middleware connection. Whilst the Visio application is relatively expensive, Microsoft offer a freeware application, Microsoft Visio Viewer which allows for .vsd files to be opened effectively in read-only mode. Visio files can also be opened using Microsoft Internet Explorer.
Microsoft Internet Explorer Microsoft Visio Microsoft Visio Viewer
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.