This document provides an overview of safety responsibilities for supervisors. It is part of a three-part presentation on "The ABC's" of safety. The presentation covers: 1) Knowing the work by understanding the machine, material, method, measures, atmosphere, and people involved. Supervisors should know and use the company's safety management system. 2) Communicating hazards. 3) Practicing safety skills. The aim is self-assessment for supervisors to demonstrate diligence in managing safety. Additional training may be required. Supervisors must understand and comply with applicable safety laws and regulations for their work.