I think GUMPS is more of a mnemonic device used as a sort of mental checklist in an attempt to be able to remember more things reliably without the use of a written checklist. Different than pointing and calling which associates an action with the thing to be checked.
For computer folks, a mnemonic is like a hard disk b-tree.
It's a way to manage a large database by extracting a small collection of pointers into small fast memory, which is then expanded as needed by accessing slower remote memory
