1. GNU Simula compiler GNU Cim is a compiler for the programming language Simula (except unspecified parameters to formal or virtual procedures (see the documentation for how portable code for formal procedures can be written)). It offers a class concept, separate compilation with full type checking, interface to external C routines, an application package for process simulation and a coroutine concept. The portability of the GNU Simula Compiler is based on the C programming language. The compiler and the run-time system is written in C, and the compiler produces C code, that is passed to a C compiler for further processing towards machine code. From Debian 3.0r0 APT