greenbrier bunker logo questions

I recently toured the bunker at the Greenbrier resort in WV. No cameras, etc allowed. There was a green logo on the doors (blast doors)
kinda like a computer chip look but also like a nazi symbol. the color was a light green. I have searched for this logo as a brand but now where to be found. The company....CSX IP

CSX is the train company...IP is control of product shipping.......information control of market product dissemention. I want to ask the board what did/does the logo mean and has anyone else seen it? I will try to scan a drawing of it today since I don't have a photo. If anyone recently has been there......I want their thougts on the place as well.
Thanks for the boards help.
speaknoevil07