IN THE COMMENTS: Steven B says:
My conspiracy theory: The memo is a fake. I've read several different places that Rumsfeld despises acronyms, never uses them, and doesn't allow them to be used in documents he reads or dictates.
Ruth Anne says:
Stephen B: If your acronym theory is correct, here's another one that crept in, "Korean Katusas"
Katusa is an acronym for Korean augmentee to the U.S. Army.
Is that true about Rumsfeld and acronyms?
MORE: By the Sea writes:
I worked on Secretary Rumsfeld's personal staff for three years and at least the writing style is consistent with his. He does use acronyms, and especially in snowflakes, those nasty things that come drifting down from his office that ruin your chances of going home on time.
All I can say is based on writing style, it seems authentic.