The '''Shared Source Common Language Infrastructure''' ((SSCLI), previously codenamed '''Rotor''', is [[Microsoft]]'s [[shared source]] implementation of the [[Common Language Infrastructure|CLI]], the core of [[Microsoft .NET|.NET]]. Shared source is not real [[open source]] (e.g. it's not suitable for commercial use) but it makes it possible for [[programmer]]s to examine the implementation details of many .NET libraries, as well as for [[hacker]]s to create and use modified CLI versions. Microsoft provides the Shared Source CLI as a reference CLI implementation and expects it to be of real value to students learning cross-platform compiler technologies, class system design guidelines, and so on, being the real-world illustration to their lectures.
The Shared Source CLI comes pre-configured to run on [[Microsoft Windows|Windows]], [[FreeBSD]] (version 4.7 or newer), and [[Mac OS X]] 10.2. It is designed such that the only thing that needs to be customized to port the Shared Source CLI to a different platform should be a thin PAL (platform abstraction layer).
