Visio is a diagramming tool created by Microsoft.  This short presentation-style video gives a thorough overview of Visio 2007 and the various uses to which it can be put.

These uses can include diagrams that represent Data, Processes and Systems.  We discuss the variety of different templates included that make it easy to create architectural diagrams, network diagrams, engineering drawings, process diagrams, flowcharts and organisation charts, timelines, and maps and floor plans.

Bear in mind that there are two versions of Visio, Standard and Professional.  The Student edition is normally based on the Standard version, so if you have that one you may find that many of the stencils and shapes featured in these video tutorials are missing.