Abstract : This note reports on the writer's experience moving DEC-10 SIMULA programs to CMS and executing the programs with CMS SIMULA. The languages implemented by the two compilers is the same and this makes the transfer of SIMULA programs very easy. In contrast, it is very difficult to transfer Fortran programs from a DEC-10 to CMS. The two main sources of difficulty in transferring programs are the differences in the character set and file system of the two systems and the fact that CMS lacks many of the capabilities that TOPS-10 users take for granted. The directions for moving DEC-10 SIMULA programs to IBM SIMULA that are provided with release 3 refer to older versions of IBM SIMULA and it is now possible to preserve most of the separately compiled classes and procedures while moving programs to CMS SIMULA.