The book includes most of the source code for version 3.6 of the compiler, which was written as a literate program using noweb. As of July 2011 the current version of LCC is 4.2, but much of the book still applies to this version. The major change since the book was published is in the code-generator interface, which is described in a separate document. The Lcc-win32 or LccWin32 system is a full featured C Development Environment for the Microsoft Windows operating system, written by Jacob Navia