Why is called n-type and p-type semiconductor? What is behind the choice of n and p as letters to represent the 2 different types of semiconductors?

Question

This is a naming question, not so much about electrical engineering.

I keep forgetting/mixing up which is the n-type and which is the p-type semiconductor.

Usually the names act like mnemonic devices for us to more easily recall which object is associated with which label/word.

What does the n stand for?

What does the p stand for?

For example, I would name it h-type form hole-type instead of p-type to remove the confusion. But I'm assuming there is already a connection like this behind the use of p and n letters - i just don't know it.

Are this just arbitrary names/letters? (doesn't make much sense to be arbitrary)

What keeps you personally from mixing the 2.

Answer 1

The n stands for negatively doped, when you add more electrons to a semiconductor.
The p stands for positively doped, when you add less electrons or holes.

I know that electrons are negative, and holes are positive, that's how I remember.