Project Styx: Little is known about this obscure and highly classified project, except that it was dedicated to weapons research. It is centered in an isolated redoubt in Canada, in a section accessible via a four-mile-long monorail tunnel. The main entrance was guarded by deadly security measures and required C-5 clearance (the gates only required B-12). Among other things, Styx seems to have been devoted to the development of sec hunter droids. (Chill Factor)
In Greek mythology, Styx was a deity and a river that formed the boundary between Earth and the Underworld (the domain often called Hades, which also is the name of its ruler). The rivers Styx, Phlegethon, Acheron, Lethe, and Cocytus all converge at the center of the underworld on a great marsh, which sometimes, also is called the Styx. According to Herodotus the river Styx originates near Feneos.
Styx was also an American rock band formed in 1970 from Chicago that became famous for its albums released in the mid-1970s and early 1980s. They were best known for melding the style of pop rock with the power of hard-rock guitar, strong ballads and elements of international musical theater.