Interestingly RISC OS had something like this, where graphical programs were composed by dragging and dropping icons representing a document. So for example, to

Interestingly RISC OS had something like this, where graphical programs were composed by dragging and dropping icons representing a document. So for example, to save a file, you open the menu and see an icon representing that file. You then drag it into the file manager, a separate program, to tell it where the file will go. https://en.wikipedia.org/wiki/Pipeline_%28software%29#Pipelines_in_GUIs https://en.wikipedia.org/wiki/Pipeline_%28software%29#Pipeli...