Part 4 of the series - Safety and the Operator - presents practical safety information along with the relevant concerns of machine owners and operators. This program integrates safety with important issues such as economics, comfort, recreation, convenience, profits, and sustainability. Students will gain an overview of the issues relating to machine costs, productivity and safety on the farm and in the landscape. Safety and the Operator points out the costs to society of machine-related injuries from rollovers, thrown objects and other hazards, and how these are reduced by Roll-Over-Protection-Structures (ROPS), cabs, and by design improvements to all-terrain vehicles (ATV's), chainsaws, lawn mowers, etc. This program also shows safety and costs aspects from the perspectives of owners, employees, manufacturers, public, and governmental agencies responsiblefor safety and environmental concerns.