A drawing and diagramming program for Windows from Microsoft that includes a variety of pre-drawn shapes and picture elements that can be dragged and dropped onto the illustration. Users can define their own elements and place them onto the Visio palette. The Visio package is part of the Microsoft Office brand. Standard and professional editions are available.Visio was introduced in 1992 by Seattle-based Shapeware, which coined its name from the pre-drawn shapes. It changed its name to Visio Corporation in 1995 when it went public and was acquired by Microsoft in 1999.