Not just for Constitutional Scholars any more! It's the OS our government and pretty amazingly intact since the v.1.0 release. It replaced the beta - the Articles of Confederation - which was the duct tape that held together the Colonies still catching their breath from the Revolution. A few major upgrades and bugs worked out in subsequent releases: abolition of slavery, voting rights and representation. An amazing kernal to build on.
Download: U. S. Constitution (16k)