For example, in the demographic profile published by the Direktorat Bina Masyarakat Terasing (1990), the surveyed populations are each typologized according to a seemingly scientific code relating to such characteristics as: F Bodily characteristics (F₁ Generally athletic, tall, upstanding / F₂ Generally pyknic, slender, medium / F₃ Generally short, fat, small)[…]
Source: wiktionary