I bought a book recently: Logo Design Volume 2 by Ed. Julius Wiedemann, published by TASCHEN. In that book on page 352 there is Norton Symantec logo presented as a sample. I found interesting that the sign design was made by Pentagram studio. Here’s the proof link. Is there a link between gloomy Norton’s products interface style (e.g. Norton Internet Security 2011) and occult-derived pentagram sign? I really do not know.