Mercury 9.9 questions

[Kris_2020]

Can anybody tell me what the letters in a mercury 9.9 stand for?
I am guessing the 9.9M 4S means Manual 4-stroke. How about ML, EH, ELPT, ELH?? What do these stand for?

[Hot Runr Guy]

http://www.outboardrepairs.com/topics/007111.html

HRG

[Kris_2020]

That helped :)
Thanx