Re: Old skool
I wouldn't even say that is true for the modern person.
IT: Solves common problems through basic knowledge and searching car forums (eg. my steering wheel fell off, my car won't start). Maybe runs a few OEM diagnostics, maybe uses some third-party tools... But usually unpaid for this extra work.
Infastructure: Builds and maintains the roads the cars drive on.
Programming: Installs custom parts (or prefab/aftermarket parts from CarOverflow) in a car and prays it still runs afterwards.
Designer: Makes the car look pretty and gives guidelines for the engineers.
Engineer: Building the car to spec.