> Back in the day "RAM doublers". Because you may laugh at the idea of paying for software to pretend to increase your RAM rather than just actually buying RAM, but remember, "fix the damn problem". Nobody wants to hear about it being impossible, I want software that doubles my RAM, now write it...

Some of those products actually worked. They compressed RAM instead of paging it to disk. Which was a net benefit back then, and often still is.

Similar techniques are in use in modern Windows, macOS and Linux.