CMS/DOS However, in CMS/DOS, there is no such thing as a job. Consequently, ASSGN and DLBL commands remain in effect for an entire CMS/DOS session,
unless they are reset by another ASSGB or DLBL command. Also, in CMS, you can place all the commands you need to compile and execute a program
in an EXEC file and invoke that EXEC file by its filename. Part 1. Planning for System Generation 37

38 IBM VM/370 Planning and System Generation Guide