From the outset, Revit was intended to allow architects and other building professionals to design and document a building by creating a parametric three-dimensional model that included both the geometry and non-geometric design and construction information, which is also known as Building Information Modeling or BIM Eastman C. At the time, several other software packages—such as ArchiCAD and Reflex—provided a three-dimensional virtual building model, and let the user control individual components via parameters parametric components. Two key differences in Revit were that users created parametric components in a graphical "family editor" rather than a programming language, and the model captured all relationships between components, views, and annotations so that a change to any element automatically propagated to keep the model consistent. The concept of bi-directional associativity  between components, views, and annotations was a distinguishing feature of Revit for many releases.
Total downloads: It features tools for generating and adjusting 3D models, analyzing their structures, modifying specific elements, etc.
Curso Autodesk Revit 2014: Aula 01