Question: Is a Roscoe mainframe different from an IBM Mainframe? How different is it? Is Roscoe a emulator to log into the IBM Mainframe?
Answer: There are several different operating systems that run on IBM mainframes eg. MVS, VSE. These provide the batch environment and require a compatible online environment to allow you to create the programs and jobs that you are going to run. Companies that run MVS usually run TSO/ISPF to provide this online environment and one of the choices available to provide this enviroment for VSE is Roscoe. I don't know if there is a version of Roscoe that will work with MVS.
This article written by Stephen Chapman, Felgall Pty Ltd.