It stands for Head, Heart, Hands, and Health. (As shown Below)
The Pledge
"I pledge my head to clearer thinking,
my heart to greater loyalty,
my hands to larger service
and my health to better living,
for my club, my community, my country, and my world."
They stand for:-HeadHeartHandsHealth
4 horseman of the Apocolyps.
The clover stands for head, heart, hands, health.
hands, heart, head, health
If you are asking about pencils, it represents a degree of hardness of the 'lead' as in H for hard, then 2H 3H 4H and up to 9H
The clover stands for head, heart, hands, health.
Hydrogen
I believe it is Heart, Hand, Health and Home. But I could be wrong.
H-R- Pufnstuf - 1969 The Stand-in 1-9 was released on: USA: 4 October 1969 Netherlands: 5 August 1970
Looks like 4 where the horizontal bar meets the vertical bars.
Math is an abbreviation of mathematics: it is not an acronym. So the h does not stand for anything!
Howard.