I call it Atari, in the same way that NES is just Nintendo and the Genesis is Sega. It's the most recognizable console from that company.
Calling the Atacobox an AtariVCS is equally offensive for calling itself VCS, and for calling it Atari.
Never heard anyone refer to the Genesis as the SEGA.
And while I am thinking about it people need to stop referring to the original Nintendo as Ness. It is N,E,S, just like my initials are lam not lamb. People sound so stupid when they say Ness or Snezz. It would be like saying the VCS is the Atari Vics.
The N64 is not the NeSixteeFour and the Gamecube is not NinGiC.
While I am ranting the walkers in Star Wars are A,T, A,T, not at at. They are initials. That would mean the dummies would say the AT-ST are at steh.... dumb just dumb.
Come on people!
Edit* if you pronounce it Ness or the SNES Snezz you sound dumb. I am sure you are a nice person but don't worry there is hope, and you can change. Just remember they are initials.