Variations on Power Steering

What Is Power Steering and How Does It Work?

https://www.caranddriver.com/features/a27888229/power-steering/

How Electric Power Assisted Steering (EPAS) Works, And Why It's Better Than Hydraulic:

https://www.carthrottle.com/news/how-electric-power-assisted-steering-epas-works-and-why-its-better-hydraulic

Electric power steering (EPS) -  Overview electric power steering system (for assisted & highly automated driving):

https://www.bosch-mobility.com/en/solutions/steering/electric-power-steering-systems/

A Comprehensive Comparison Test of Electric and Hydraulic Steering Assist:

https://www.caranddriver.com/features/a15122019/electric-vs-hydraulic-power-steering/