If one is considering the technological medium of 
the car it is easy to see that the car is a figure  in 
a ground  of services which includes the highways 
and factories and oil companies and all of those 
employed by these agencies. The car as figure  
plays against the ground  of services which it 
brings into existence, so that there is perpetual 
action and responses between the complex 
variety of tastes and needs of people and the 
relatively simple hardware of the car.

“Speech for Conference on Management 
Information Systems,” unpublished, San Francisco, 
Sept. 12, 1974.