Derek F. Abell identified five patterns of target market selection:
Single Segment Concentration e.g. Porsche (sports car only, targeted at the rich and famous)
Selective Specialization e.g. Procter & Gamble personal care products (different products for different markets)
Product Specialization e.g. microscope (sold to different markets such as universities, government and commercial laboratories)
Market Specialization e.g. firms that sell assortment of products only to university laboratories
Full Market Coverage e.g. Coca-Cola
The diagrams illustrate these five patterns.
Note: P = Product, M = Market