Engines are mechanical devices that convert energy into motion, powering a variety of machines and vehicles. The most common types include internal combustion engines (ICE), which burn fuel to generate power, commonly found in cars, motorcycles, and trucks. Electric engines use electrical energy to drive motors, offering an eco-friendly alternative in electric vehicles. Hybrid engines combine both ICE and electric power for improved efficiency. Jet engines propel aircraft using high-speed exhaust gases, while steam engines use heat and water vapor. Engines are essential in industries ranging from transportation to manufacturing, each offering unique benefits for specific applications.