This document summarizes different types of farming systems around the world: 1) Traditional/subsistence agriculture is practiced in underdeveloped countries using simple techniques like burning and sowing, with a focus on self-consumption and communal ownership. 2) Plantation and industrial agriculture are speculative and use intensive techniques, a single crop, wage laborers and private ownership to produce for profit. 3) Commercial agriculture produces crops tailored to market demands, using both intensive and extensive techniques across oceanic and mediterranean regions for profit.