1. OS4000 JCL was based on the Cambridge University Phoenix command interpreter . 2. 4OS2 is a similar replacement for IBM's OS / 2 command interpreter . 3. So-called command interpreter and options to be passed to the command interpreter. 4. So-called command interpreter and options to be passed to the command interpreter . 5. This command is no longer available in the command interpreter of newer Windows operating systems. 6. Some commands were built into the command interpreter , others existed as external commands on disk. 7. In most Unix shells ( command interpreters ), this is represented by the vertical bar character. 8. Programs were entered into the command interpreter starting with line numbers, integers from 1 to 32767. 9. One could determine the status of a terminal from the command responses, printed by the command interpreter . 10. ASCII remains the de facto standard for command interpreters , programming languages and text-based communication protocols.