AutoCAD MEP software is the discipline-specific version of AutoCAD software
for mechanical, electrical, and plumbing (MEP) designers and drafters.
AutoCAD MEP automates tedious drafting tasks, enabling designers and
drafters to create more accurate construction documentation faster. Sharing,
collaborating, and coordinating with architects, structural engineers, and
contractors is easier using the software...s reliable, widely used DWG... file
format.

http://www.autodesk.com