Why is Amateur Radio referred to as HAM radio?

There are a lot of licenced radio operators around the world that may often wonder why Amateur Radio is referred to as HAM radio. Also a lot of licensed radio operators already know this.

This could be one of the reasons below: (why I say one of the reasons is that I am not 100% sure of this, so to cover my derrière, I am not responsible for this statement).

The word “HAM” as applied to 1908 was the station CALL of the first amateur wireless station operated by some amateurs of the Harvard Radio Club. They were Albert S. Hyman, Bob Almy, and Poogie Murray.

At first they called their station “HYMAN-ALMY-MURRAY”. Tapping out such a long name in code soon became tiresome and called for a revision. They changed it to “HY-AL-MY”, using the first two letters of each of their names. Early in 1901 some confusion resulted between signal from amateur wireless station “HY-ALMU” and a Mexican ship named “HYALMO”.

They then decided to use only the first letter of each name and the station CALL became “HAM”.