Just a correction: SWAP isn't an acronym. It was a mistake I made while writing this article.

SWAP is exactly what you wrote. I apologise for my mistake. The article is updated with the correct information.

I wasn't aware of SWAP until I learned about it in a course in the university discussing CPU architecture in detail.

I remember learning how SWAP plays a big part in how operating systems can operate reliably without system crashes even when they run extremely low on D-RAM.