Old but still reasonably accurate for a high-level view is the original "open source" announcement paper http://www.ravenbrook.com/project/mps/doc/2002-01-30/is

Old but still reasonably accurate for a high-level view is the original "open source" announcement paper http://www.ravenbrook.com/project/mps/doc/2002-01-30/ismm2002-paper/ismm2002.html http://www.ravenbrook.com/project/mps/doc/2002-01-30/ismm200...