You Say Potato, I Say Potahto
You say MRI, I say NMR. These sound almost like William Steig would have used them, but not quite.
Chad over at Uncertain Principles give the lowdown on the phenomenon of Nuclear Magnetic Resonance
[...] Nuclear Magnetic Resonance (NMR), which is the “M” and the “R” in “Magnetic Resonance Imaging”– they ditched the “N” because “nuclear” [...]