The result is called “digital representation” or,About Digitizing Articles more specifically, a “digital image”, for the object, and “digital form”, for the signal. McQuail identifies the process of digitalization having immense significance to the computing ideals as it “allows information of all kinds in all formats to be carried with the same efficiency and also intermingled”
Analog signals are continuously variable, both in the number of possible values of the signal at a given time, as well as in the number of points in the signal in a given period of time. However, digital signals are discrete in both of those respects, and so a digitization can only ever be an approximation of the signal it represents.
A digital signal may be represented by a sequence of integers. Digitization is performed by reading an analog signal A, and, at regular time intervals (sampling frequency), representing the value of A at that point by an integer. Each such reading is called a sample.