Could you give us an example of a pre-structured programming, high level language that supported the things that you talk about. PDPs had instruction support fo

Could you give us an example of a pre-structured programming, high level language that supported the things that you talk about. PDPs had instruction support for cooperatively executing tasks but the return address was stored in a register, and was therefore limited to a depth of one. From what I know stack based subroutines really became common around Dijsktra's famous paper which really ought to have been called 'Use the Stack, Stupid" rather than GOTO considered harmful. I am more than willing to be corrected with citations to the contrary.