The Origin of the Word 'Mana' in Gaming

[GossamerMoon]

Before I got into gaming, I was familiar with it in two ways:

1. Mana from heaven
2. Mana as a source of magic in fantasy novels.

I suspect the idea is that mana isn't literally bread (as one is led to think in the scriptural stories), but energy handed down from on high.

I'm half asleep. Hope it makes sense. I have no basis of knowledge other than my suppositions.