One World Systems is a real estate investment and property management company founded in 2006 that helps private investors earn high returns through low-risk real estate investments. The document provides an example of how an investor could earn a 10% annual return on a $10,000 investment secured by a $100,000 duplex property purchased with 10% down. Monthly rental income of $600 would cover the mortgage payment and operating costs, leaving $150 in monthly profit for the investor.