welcome to Autocad 2011

Uncover a wealth of new opportunity using Autodesk® 2011 software now.

Dear Customer,

Given tighter timelines, thinner budgets, and tougher competition, it's time to turn today's business challenges into new opportunities using Autodesk® 2011 software.

Discover how 28 years of Autodesk 2D and 3D design, engineering and entertainment software can help you exceed client expectation. Find out how one of the broadest portfolios of design software in the market can help you manage your projects from concept to completion; visualize them using animations and walkthroughs; and simulate performance in the digital world - before they're ever in the real one.

Work Smarter with new tools built into Autodesk 2011 software
Benefit from new features such as 3D surface modeling tools, point cloud support, and inferred constraint capabilities - and see how you can achieve greater speed, power, and flexibility with AutoCAD® 2011 software.
Experience the revolutionary new design capabilities inside Autodesk® Inventor® software, Autodesk® Revit® software, Autodesk® 3ds Max®, Autodesk® Maya®, or Autodesk® Flame® software now.

Autodesk Subscription:
If you have Autodesk® Subscription, you can access your Autodesk 2011 software right now. Simply download your upgrade from the Subscription Center and be among the first to benefit from new 2011 software features.

Source from autodesk

i'm started Autocad with version 12 dos,new feature for this version is surface analysis.