The BEAM robotic concept is the brain child of Mark W. Tilden, Los Alamos National Laboratory, New Mexico USA. Since its inception, it has grown to become a significant branch of robotics, particularly (but not limited to) hobbyists.
BEAM is an triple acronym, standing for:
Biology Electronics Aesthetics Mechanics,
Building Evolution Anarchy Modularity, and
Biotechnology Ethnology Analogy Morphology
These acronyms indicate the major themes of BEAM robotics.