Phil Salvador wrote an article about the long lost SimRefinery by Maxis Business Simulations, and somebody who read it was able to dig up a floppy disk with the original game!
When SimCity got serious: the story of Maxis Business Simulations and SimRefinery
https://obscuritory.com/sim/when-simcity-got-serious/
SimRefinery recovered
https://obscuritory.com/sim/simrefinery-recovered/
A close look at SimRefinery
https://obscuritory.com/sim/simrefinery-analysis/
The sprawling, must-read history of Maxis’ former “serious games” division
https://arstechnica.com/gaming/2020/05/the-sprawling-must-re...
A lost Maxis “Sim” game has been discovered by an Ars reader [Updated]
https://arstechnica.com/gaming/2020/06/a-lost-maxis-sim-game...
SimRefinery EXISTS! Let's play it!