What does the HAM stand for in HAM radio?

Answer:
There are several theories, but the most widely accepted is that H.A.M. is an acronym paying homage to three great radio pioneers: Heinrich Hertz (demonstrated existence of electromagnetic waves), Edwin Armstrong (invented modern FM radio), and Guglielmo Marconi (developed wireless telegraphy).
First answer by Alcohen2006. Last edit by Sstoebe. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 3 [recommend question].