The initials "SKG"(in the DreamWorks logo) stand for the company's co-founders:
(Dreamworks' hopeful founders in 1994: From left, Jeffrey Katzenberg, Steven Spielberg and David Geffen)
Spielberg (film director and founder of Amblin Entertainment),
Katzenberg (former head of The Walt Disney Company's film studios),
Geffen (founder of Geffen Records)