What is Steam-Turbine and Steam Engine?

Steam turbine: Steam turbine was invented by Charles Parsons in 1884. It is a device that uses the thermal energy (extracted from pressurized steam) to operate the work on a rotating output shaft.

Steam Engine: A steam engine is a device that uses the steam as its working fluid to do mechanical work. This steam works to push a piston back and forth inside a cylinder. And this pushing force is further converted into rotational force with the help of connecting rod and flywheel.