Figure 4: Relation between technical realizations and data structures 
342 
analogue 
differential r 
=> 
analytical r 
=^> 
digital 
analogue 
differential c 
===c> 
analytical c 
digital 
plotting 
rectifier 
plotting 
work station 
device 
device 
analogue 
n=0 
internal data 
structure 
î ¡1 1= 
=> 
digital 
image 
image 
^ 
— — —