Audience Categorisation

My target audience or any audience is normally categorised into different sections. Below I have listed the most likely sections that my target audience is going to fit into:
A - Upper middle class: 
Top management, bankers, lawyers, doctors and other professionals.
B - Middle class:
Middle management, teachers, many 'creatives' for example graphic designers 
etc.
C1 - Lower middle class: 
Office supervisors, junior managers, nurses, specialist clerical staff etc.
C2 - Skilled working class: 
Skilled workers, tradespersons (white collar). 
D - Working class:
Semi-skilled and unskilled manual workers (blue collar).
E - People at lowest level of income:
Unemployed, students, pensioners, casual workers.