Pro/ENGINEER is a 3D parametric solid modeling CAD package. The parametric features make modeling flexible, as models are able to change based on the modification of their parent parts and assemblies. Pro/E is a high end manufacturing CAD system that can range in price from a few thousand per seat for Foundation to $40k per seat with all the options. Modules include parts, assemblies, drawings, sheetmetal, surfacing, NC, piping, cabling, ecad, mold, weldments, and behavioral modeling (BMX). There are a host of different PDM systems to help you manage Pro/E files.