Guess it's just from being used to it for so long it becomes secound nature. Although in regards to Zero I just do the lazy thing and say DWN as Dawn (as you probably saw from that site) even though I know it means Dr Wily Numbers (or Special Wily Numbers in Bass's case).
The way you mention his model number sounds like it's not common knowledge though :S
(I do what I'm told)
Meh at least it shows of his lifespan.
lol