Herbert W. Franke (born 14 May 1927 in Vienna) is an Austrian scientist and writer. Die Zeit calls him "the most prominent German writing Science Fiction author". He is also one of the important early computer artists (and collectors), creating computer graphics and early digital art since the late 1950s. Franke is also active in the fields of future research as well as speleology. He uses his pen name Sergius Both as this Avatar name in Active Worlds and Opensimulator grids. The Sergius Both Award is given for creative scripting in Immersionskunst by Stiftung Kunstinformatik, first time issued at Amerika Art 2022.
Franke studied physics, mathematics, chemistry, psychology and philosophy in Vienna. He received his doctorate in theoretical physics in 1950 by writing a dissertation about electron optics.
Since 1957, he has worked as a freelance author. From 1973 to 1997 he held a lectureship in "Cybernetical Aesthetic" at Munich University (later computer graphics - computer art). In 1979, he co-founded Ars Electronica in Linz/Austria. In 1979 and 1980, he lectured in "introduction to perception psychology" at the Art & Design division of the Bielefeld University of Applied Sciences. Also in 1980 he became a selected member of the German PEN club.
A collection of short stories titled "The Green Comet" was his first publication. In 1998, Franke attended a SIGGRAPH computer graphics conference in Orlando and was a juror at the "VideoMath Festival" Berlin. He also took part in innumerable performances and presentations.