ABS is indeed the Anti-lock Braking System and I think it depends on sensors to determine the skidding amount and on software to determine the interval at which the brakes are applied and let go. So, the ABS is run off electricity and not a purely mechanical system. However, brakes themselves (without the "anti-lock" part) are purely mechanical/hydraulic, but since the brakes locked up, it didn't matter.
I'm not entirely sure about electric power steering systems and how they work.
In a hydraulic power steering system, if the power is cut, the driver can still turn the wheel (although it's much harder to do). In an EPS, is this still true?
I'm not entirely sure about electric power steering systems and how they work.
ABS: https://en.wikipedia.org/wiki/Anti-lock_braking_system
EPS: http://www.caranddriver.com/features/electric-vs-hydraulic-s...
https://en.wikipedia.org/wiki/Electric_power_steering