How are internal combustion engines similar to external combustion engines?

Internal combustion engines and external combustion engines both convert fuel into mechanical energy through combustion. In both types, the combustion process generates heat, which is then used to produce work, typically by moving a piston or rotating a turbine. They also share similar components, such as cylinders, valves, and fuel delivery systems, although their operational processes differ in where combustion occurs. Ultimately, both types aim to harness energy from fuel for various applications like powering vehicles or machinery.