Designed by Marty Goldstein and C.B. Smith for VGC in 1973. Initial weights were Thin, Plain, Heavy, and Fat.
Fotostar offered 2″ film fonts under the name Sun. TypeShop created the first digital version in the mid-1970s and Elsner+Flake licensed it in the mid-1990s under the name Digital Sans. [Elsner+Flake]
Canada Type released Sol Pro in 2010 with “optical improvements to the original design, more weights [five weights in two widths], italics, small caps, biform shapes, alternates, and extended language support.”