I learnt a lot more than I ever wanted to know about every aspect of elevators from Elevator Hacking: From the Pit to the Penthouse with Deviant Ollam (who seem

I learnt a lot more than I ever wanted to know about every aspect of elevators from Elevator Hacking: From the Pit to the Penthouse with Deviant Ollam (who seems to be like a professional elevator pen tester) & Howard Payne, from DEFCON 22. Fascinating stuff, I think it will be worth your time. https://www.youtube.com/watch?v=1Uh_N1O3E4E https://www.youtube.com/watch?v=1Uh_N1O3E4E