This checklist outlines the startup procedure for a Boeing 757-200 aircraft. It involves turning on electrical systems like batteries, generators, and buses. It also includes initializing hydraulic, fuel, bleed air, anti-ice, and engine systems. Specific steps include starting the APU, turning on pumps and valves, programming the flight computer, and using the engine ignition to sequentially start each engine to reach the proper RPM levels before releasing parking brakes for taxi.